The possible solution follows. First, write the equation:
N + (N+1) + (N+2) = (N+3) + (N+4) + 19
where N stands for the 1st integer in sequence, (N+1) is a 2nd, (N+2) is a 3rd and so on. Next, solve the equation for the N:
N + 3 = 19 + 7
N = 23
thus, if the 1st integer number N=23 then the 3rd number: (N+2) = 25
Hope this may help.