The centre number of each square is found by using the order of operations applied to the numbers that surround it. The challenge is to solve for the variable $x$.

 $\begin{array}{ccc}&{9}^{\frac{1}{2}}& \\ &\textbf{44}& \\ {64}^{\frac{1}{2}}&&{16}^{\frac{1}{2}}\end{array}$ $\begin{array}{ccc}&{81}^{\frac{1}{2}}& \\ &\textbf{32}& \\ {49}^{\frac{1}{2}}&&{4}^{\frac{1}{2}}\end{array}$ $\begin{array}{ccc}&{64}^{\frac{1}{2}}& \\ &\textbf{75}& \\ {49}^{\frac{1}{2}}&&{x}^{\frac{1}{2}}\end{array}$

Can you solve for $x$?