$\begin{align*} & log_{x}^{\dfrac {x} {100}}=\log x\\ & \log _{x}^{\left( \dfrac {x} {10}\right) ^{3}}=\log x\\ & 3\log _{x}^{x}-\log _{x}10=\log x\\ & \log _{x}^{10}=a\\ & 3-a=\dfrac {1} {a}\\ & a^{2}-3a+1=0\end{align*}$
\begin{align*} & x_{1}=\dfrac {3-\sqrt {5}} {2},x_{2}=\dfrac {3+\sqrt {5}} {2}\\ & \log x=\dfrac {3\pm \sqrt {5}} {2}\\ & 10^{\dfrac {3+\sqrt {5}} {2}}10^{\dfrac {3-\sqrt {5}} {2}}\\ & ,\\ & 10^{\dfrac {3+\sqrt {5}} {2}}.10^{\dfrac {3-\sqrt {5}} {2}=10^{3}}\end{align*}