Finding the Fourth Proportional to 31,142.18, 46,713.17 and 13,361.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,142.18 : 46,713.17 = 13,361.31 : x
2. Step 2: Convert to fraction form
   31,142.18/46,713.17 = 13,361.31/x
3. Step 3: Cross multiply
   31,142.18x = 46,713.17 × 13,361.31
4. Step 4: Simplify right side
   31,142.18x = 624,149,178.86
5. Step 5: Solve for x
   x = 624,149,178.86/31,142.18
6. Step 6: Final answer
   x = 20,041.92