\[\boxed{\mathbf{1267}\mathbf{.}}\]
\[h = 130\ м.\]
\[Длина\ левого\ отрезка:\]
\[tg\ 68{^\circ} = \frac{130}{l_{1}}\]
\[l_{1} = \frac{130}{tg\ 68{^\circ}}\]
\[l_{1} \approx \frac{130}{2,4751} \approx 52,52\ (м).\]
\[Длина\ правого\ отрезка:\]
\[tg\ 46{^\circ} = \frac{130}{l_{2}}\]
\[l_{2} = \frac{130}{tg\ 46{^\circ}}\]
\[l_{2} \approx \frac{130}{1,0355} \approx 125,54\ (м).\]
\[Длина\ моста:\]
\[l = l_{1} + l_{2} = \frac{130}{tg\ 68{^\circ}} + \frac{130}{tg\ 46{^\circ}} \approx\]
\[\approx 52,52 + 125,54 \approx 178\ (м).\]
\[Ответ:\ \ \frac{130}{tg\ 68{^\circ}} + \frac{130}{tg\ 46{^\circ}} \approx 178\ м.\]