Garfinckel, Brooks Brothers, Miller & Rhoads increased its operating profit for the third quarter by 7.6 percent, from $3.19 million to $3.43 million and showed an 18.3 percent earnings gain, to a total of $3.77 million, including credits for non-recurring items.

The Washington based retailer, which operates 209 specialty and department stores in 37 states, said sales for the quarter increased to $99.2 million from $83 million.

Earning per share were 74 cents last year, 75 cents from operations and 81 cents including the non-recurring items, which resulted from recent acquisitions.

"Results for the quarter reflect improved performances by our Brooks Brothers, Miller & Rhoads and Miller's companies, as well as the contribution of Catherine's Stout Shoppes, which was acquired in February 1978," said David Waters, the company's chairman.

For the first nine months of the year, Garfinckel Corp.'s earnings were up 26 percent, to $5.8 million ($1.25 per share) from $4.3 million (99 cents) and sales increased 24 percent to $265 million from $213 million.

Waters said results for the year to date are "encouraging," but said the company's growth rate for the fourth quarter will not be as great because "there has been some easing of consumer demand."

CACI Inc. reported its first quarter earnings more than doubled to $221,000 ($2.17 per share) from $101,000 ($1.53) while revenues jumped to $3.8 million from $2.9 million. Based in Arlington, CACI provides computer research, programming and analysis services.