Answer
$x\approx.57$
Work Step by Step
We can set the cross products of the given proportion equal to each other and then solve for the unknown variable.
$13.5\times x=1.7\times4.5$
$13.5x=7.65$
Divide both sides by 13.5.
$\frac{13.5x}{13.5}=\frac{7.65}{13.5}$
$x\approx.57$