Answer
$1450$
Work Step by Step
The given proportion is
$\Rightarrow \frac{286}{x}=\frac{11.8}{59.7}$
Cross multiply.
$\Rightarrow 286\times 59.7=11.8 \times x$
Isolate $x$.
$\Rightarrow \frac{286\times 59.7}{11.8}=x$
Simplify.
$\Rightarrow 1446.966=x$
Round to three significant digits.
$\Rightarrow 1450=x$