To find angle $ \gamma $ use Thw Law of Sines:
$$ \dfrac{ \sin( \alpha )} { a } = \dfrac{ \sin( \gamma )} { c } $$After substituting $a = 490$, $\alpha = 73^o$ and $c = 524$ we have:
$$ \dfrac{ \sin( 73^o )} { 490 } = \dfrac{ \sin( \gamma )} { 524 } $$ $$ \dfrac{ 0.9563 } { 490 } = \dfrac{ \sin( \gamma ) } { 524 } $$ $$ \sin( \gamma ) \cdot 490 = 0.9563 \cdot 524 $$ $$ \sin( \gamma ) \cdot 490 = 501.1037 $$ $$ \sin( \gamma ) = \dfrac{ 501.1037 }{ 490 } $$ $$ \sin( \gamma ) = 1.0227 $$ $$ \gamma = \arcsin{ 1.0227 } $$$ \arcsin(1.023) $ is not defined $ \Longrightarrow $ The problem has no solution.