Consider the ordinary differential equation $x^{2} \frac{d^{2} y}{d x^{2}}-x \frac{d y}{d x}-3 y=0$, with the boundary conditions $y(x=1)=2$ and $y(x=2)=17 / 2$. The solution $y(x)$ at $x=3 / 2$, rounded off to 2 decimal places, is $\_\_\_\_\_\_\_\_$