\( \Rightarrow \)\({x^{{x^{3/2}}}} = {x^{(3/2)x}}\)
\( \Rightarrow \)\({x^{3/2}} = {3 \over 2}x\) \( \Rightarrow \)\({x^{1/2}} = {3 \over 2}\)
\( \Rightarrow \)\(x = {9 \over 4}\)
Also \(x = 1\) is an obvious solution.