Bank deposits are calculated according to compound interest, that is, rolling interest. Let the principal be x.
Sum of principal and interest at the end of the first year =X*( 1+5.4%)
Sum of principal and interest at the end of the second year = x * (1+5.4%) * (1+5.4%)
Sum of principal and interest at the end of the third year = x * (1+5.4%) * (1+5.4%) * (1+5.4%) = 22646.
Find x and get 19340.59.