Nice Euler Line Problem

Consider $\triangle ABC$ , with $A=(0,0), B=(5,-10), C=(-24, 7)$ . The slope of the Euler line for $\triangle ABC$ , in its simplest form, can be written as $\dfrac{a}{b}$ . Point $D$ is the centroid of $\triangle ABC$ , whose coordinates can be written as $(d,c)$ .

If $ac+bc=x,$ what is $x+6713.8$ ?