MIDEAST STOCKS-SABIC profit boosts Saudi, Qatar hit by weak earnings

* SABIC Q3 profit at top end of forecasts * Emaar the Economic City drops after posting loss * Dubai's DXB Entertainments up before theme park opening * Qatar hit by CBQ's net loss, which misses estimates * Egypt down for fourth straight day By Celine Aswad DUBAI, Oct 19 (Reuters) - Saudi Basic Industries (SABIC) helped lift Riyadh's stock market on Wednesday after it reported a third-quarter net profit at the top end of forecasts, but a loss at Qatar's third- largest bank dragged that market lo