\[2\frac{4}{7} + 1\frac{2}{9} + 3\frac{4}{11} + 4\frac{3}{7} =\]
\[= 6\frac{7}{7} + 4\frac{22 + 36}{99} = 7 + 4\frac{58}{99} =\]
\[= 11\frac{58}{99}\]