$$-x^3+1095x^2-296250x+13500000 = 0$$
Answer
$$ \begin{matrix}x_1 = 56.92392 & x_2 = 339.47789 & x_3 = 698.59819 \end{matrix} $$
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