Answer
Ans: $x=25$
Work Step by Step
$\frac{5}{9} = \frac{x}{45}$
We need to find the unknown Number in the proportion.
First we need to find the cross product
i.e. $5\times45 = x \times 9$
So, $9 x = 225$
Divide both sides by 9
i.e. $9 x \div 9 = 225 \div 9$
so, $x=25$
