Coagulating value of the electrolytes $\mathrm{AlCl}_{3}$ and $\mathrm{NaCl}$ for $\mathrm{As}_{2} \mathrm{S}_{3}$ are 0.09 and 50.04 respectively. The coagulating power of $\mathrm{AlCl}_{3}$ is $x$ times the coagulating power of $\mathrm{NaCl}$. The value of $\underline{x}$ is ___________.