KPI goal seeking problem

[Neil_]

Hi,
I need help with a formula in the attached workbook. In Cell C3 I need a formula which will make Cell C4 equal to cell a4


Book1.xlsx

Values

budget	           actual	Correction
3113	           2629	        2629
1503	           1331	
0.325606586	   0.336111111   0


formulas

budget	           actual	Correction
3113	           2629	        2629
1503	           1331	        =?
=A3/(A2+A3)	   =B3/(B2+B3)	=C3/(C2+C3)

The formula next to the question mark must force the cell below it to equal 0.325606586