19. Найдите значение выражения \(4\frac{7}{8} : \left(2\frac{3}{4} + 1\frac{10}{19}\right)\).

\(4\frac{7}{8} = \frac{39}{8}\), \(2\frac{3}{4} = \frac{11}{4}\), \(1\frac{10}{19} = \frac{29}{19}\).

\(\frac{11}{4} + \frac{29}{19} = \frac{209}{76} + \frac{116}{76} = \frac{325}{76}\).

\(\frac{39}{8} : \frac{325}{76} = \frac{39}{8} \cdot \frac{76}{325} = \frac{57}{50} = 1.14\).

Ответ: 1,14.