Finding the Fourth Proportional to 31,839.42, 43,936.47 and 17,691.78

Step by Step Solution

1. Step 1: Write the proportion equation
   31,839.42 : 43,936.47 = 17,691.78 : x
2. Step 2: Convert to fraction form
   31,839.42/43,936.47 = 17,691.78/x
3. Step 3: Cross multiply
   31,839.42x = 43,936.47 × 17,691.78
4. Step 4: Simplify right side
   31,839.42x = 777,314,361.22
5. Step 5: Solve for x
   x = 777,314,361.22/31,839.42
6. Step 6: Final answer
   x = 24,413.58