\[\boxed{\mathbf{345}\mathbf{.}}\]
\[1)\ \frac{4}{29} \cdot 5 = \frac{4 \cdot 5}{29} = \frac{20}{29}\]
\[2)\ 12 \cdot \frac{3}{7} = \frac{12 \cdot 3}{7} = \frac{36}{7} = 5\frac{1}{7}\]
\[3)\ 36 \cdot \frac{7}{18} = \frac{36 \cdot 7}{18} = 2 \cdot 7 = 14\]
\[4)\ 9 \cdot \frac{7}{72} = \frac{9 \cdot 7}{72} = \frac{7}{8}\]