Compute
\[\frac{\sin 13^\circ + \sin 47^\circ + \sin 73^\circ + \sin 107^\circ}{\cos 17^\circ}.\]
By the sum-to-product formula,
\begin{align*}
\frac{\sin 13^\circ + \sin 47^\circ + \sin 73^\circ + \sin 107^\circ}{\cos 17^\circ} &= \frac{2 \sin 30^\circ \cos 17^\circ + 2 \sin 90^\circ \cos 17^\circ}{\cos 17^\circ} \\
&= 2 \sin 30^\circ + 2 \sin 90^\circ \\
&= \boxed{3}.
\end{align*}