Current Attempt in Progress

Two stars in a binary system orbit around their center of mass. The centers of the two stars are $6$:$32{10}^{11}m$ apart. The larger of the two stars has a mass of $3\mathrm{.}76{10}^{30}kg,$ and its center is $1\mathrm{.}90{10}^{11}m$ from the system's center of mass. What is the mass of the smaller star?