jmc

Looking at the different answer choices, we have (up to 10 digits after the decimal) $A$: $9.1234400000$ $B$: $9.1234444444$ $C$: $9.1234343434$ $D$: $9.1234234234$ $E$: $9.1234123412$ By inspection, we can see that $\boxed{9.123\overline{4}}$ is the largest number.