$14frac{2}{7}{ m{\% of}}4200 div sqrt {576} = {(?)^{frac{1}{2}}}$

$frac{{100}}{{700}} imes 4200 imes frac{1}{{24}} = {(?)^{frac{1}{2}}}$

$25 = {(?)^{frac{1}{2}}}$

$? = 625$