\[\boxed{\mathbf{2.}\mathbf{208}}\]
\[4\frac{3}{7} = 3 + 1\frac{3}{7} = 3 + \frac{10}{7} = 3\frac{10}{7};\]
\[21\frac{14}{19} = 20 + 1\frac{14}{19} =\]
\[= 20 + \frac{33}{19} = 20\frac{33}{19};\]
\[2\frac{12}{13} = 1 + 1\frac{12}{13} = 1 + \frac{25}{13} =\]
\[= 1\frac{25}{13}.\]