Do you mean like this?
** Just remove all the prints (that makes it show each month)
inicial = float(eval(input('Enter the montly saving amount: ')))
x = (1 + 0.00417)
month_one = inicial * x
month_two = (inicial + month_one) * x
month_three = (inicial + month_two) * x
month_four = (inicial + month_three) * x
month_five = (inicial + month_four) * x
month_six = (inicial + month_five) * x
print('The sixth month value is: '+str(month_six))
** Just remove all the prints (that makes it show each month)
inicial = float(eval(input('Enter the montly saving amount: ')))
x = (1 + 0.00417)
month_one = inicial * x
month_two = (inicial + month_one) * x
month_three = (inicial + month_two) * x
month_four = (inicial + month_three) * x
month_five = (inicial + month_four) * x
month_six = (inicial + month_five) * x
print('The sixth month value is: '+str(month_six))