Answer
$x\approx 3.219$
Work Step by Step
RECALL:
$$\ln{x}=y \longleftrightarrow e^y=x$$
Use the definition above to obtain:
\begin{align*}
\ln{5}&=\frac{x}{2}\\\\
2(\ln5)&=2\left(\frac{x}{2}\right)\\\\
2\ln5&=x
\end{align*}
Use a scientific calculator to obtain:
$$x\approx 3.219$$