What is the molality of an aqueous KCl solution with a mole fraction of KCl$,$ XKCl $=0\mathrm{.}508?($The molar mass of KCl $=74\mathrm{.}55$ g$/$mol and the molar mass of H$2$O is $18\mathrm{.}02$ g$/$mol$.)$

$37\mathrm{.}9$ m

$9\mathrm{.}37$ m

$0\mathrm{.}126$ m

$4\mathrm{.}50$ m

$3\mathrm{.}18$ m

the answer i got was approximately $57$ but that is not an option