Finding the Fourth Proportional to 72,839.56, 109,337.10 and 31,315.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,839.56 : 109,337.10 = 31,315.72 : x
2. Step 2: Convert to fraction form
   72,839.56/109,337.10 = 31,315.72/x
3. Step 3: Cross multiply
   72,839.56x = 109,337.10 × 31,315.72
4. Step 4: Simplify right side
   72,839.56x = 3,423,970,009.21
5. Step 5: Solve for x
   x = 3,423,970,009.21/72,839.56
6. Step 6: Final answer
   x = 47,007.01