$$x^3-257x^2+920x-99130 = 0$$
Answer
$$ \begin{matrix}x_1 = 254.91646 & x_2 = 1.04177+19.69231i & x_3 = 1.04177-19.69231i \end{matrix} $$
Explanation
This polynomial has no rational roots that can be found using Rational Root Test.
Roots were found using qubic formulas.
This page was created using
Polynomial Equations Solver