In $2021,$ ?Carleton Place, Ontario was the fastest growing municipality in Canada, with a population of $38,877.$ ?If the population grew $3\mathrm{.}90\%$ ?per year from $2017$ ?to $2021,$ ?what was the population in $2017?($ Do not round intermediate calculations and round your final answer to the nearest whole number. $)$

Population in $2017$