W$1=5$ kN$/$m

W$2=1$ kN$/$m

Ive already determined the magnitude of the resultant force to be Fr$=15\mathrm{.}5$kN

And the direction of the resultsnt force theta$=75\mathrm{.}1$ degrees. I need help finding where the force line of intersexts a horizontal line along member AB measured from A$.$