Geometry solve for $x$
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Since the last angle is $77^\circ,$ can I solve this by using law of sines? This would lead us to:
$$\frac{519}{\sin\left(77^\circ\right)}=\frac{190+x}{\sin \left( 60^\circ \right)}$$
And the answer would be $\sim271,29$ meters
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$\begingroup$Make $x$ the subject of your equation. $$x+190=519\times\frac{\sin{60^\circ}}{\sin{77^\circ}}$$ $$x=519\times\frac{\sin{60^\circ}}{\sin{77^\circ}}-190\approx 271.29$$
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