The expression is
[tex]\begin{gathered} \frac{4}{2.4}=\frac{10}{m} \\ \Rightarrow m(\frac{4}{2.4})=m(\frac{10}{m}) \\ \Rightarrow m(\frac{4}{2.4})=10 \\ \Rightarrow(\frac{2.4}{4})m(\frac{4}{2.4})=(\frac{2.4}{4})10 \\ \Rightarrow m=\frac{2.4\cdot10}{4} \end{gathered}[/tex]Finally,
[tex]\begin{gathered} m=\frac{24}{4}=6 \\ \Rightarrow m=6 \end{gathered}[/tex]The answer is m=6