Answer
$21600$
Work Step by Step
We are given:
$\dfrac{7200}{84}=\dfrac{x}{252}$
To solve the proportion, we cross multiply:
Set the product of the means equal to the product of the extremes and solve for x as follows,
$$
84x=7200\cdot 252\Longrightarrow x=\frac{7200\cdot 252}{84}=21600
.$$
