On selling a mobile for Rs 4500, a shopkeeper losses 10%. For what amount should he sell it to gain of 15%?

Selling a mobile = Rs 4500
Let CP = x
CP − loss=SP
X −$\frac{X}{100}=4500$ 
$\frac{9X}{10}$ = 4500
X = 5000
15%OF  5000
= 750

$=\frac{15}{100}$ × 5000
= 750
Amount=CP+P
=5000+750
=5750