1.22g of an organic acid is separately dissolved in 100 g of benzene $\left({\mathrm{K}}_{\mathrm{b}}=2.6 \mathrm{K} \mathrm{kg}{ \mathrm{mol}}^{-1}\right)$ and 100 g of acetone $\left({\mathrm{K}}_{\mathrm{b}}=1.7 \mathrm{K} \mathrm{kg}{\text{mol }}^{-1}\right)$. He acid is known to dimerize in benzene but remain as a monomer in acetone. The boiling point of the solution in acetone increases by $0.17°\mathrm{C}$. The increase in boiling point of solution in benzene in ${}^0\mathrm{C}$ is  $x \times {10}^{-2}$. The value of $x$ is  ______ [Atomic mass $\mathrm{C}=12.0$, $\mathrm{H}=1.0,\mathrm{O}=16.0]$