How do you solve for exponent fractions like x^(y/z)=any real number

Solve for x:
0.764663 x^1.67 = 1.62×10^-15

Divide both sides by 0.764663:
x^1.67 = 2.11858×10^-15

Raise both sides to the power of 0.598802:
1 x = 1.63381×10^-9

Divide both sides by 1:
Answer: |  x = 1.63381×10^-9