Finding the Fourth Proportional to 72,281.04, 99,744.72 and 39,575.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,281.04 : 99,744.72 = 39,575.28 : x
2. Step 2: Convert to fraction form
   72,281.04/99,744.72 = 39,575.28/x
3. Step 3: Cross multiply
   72,281.04x = 99,744.72 × 39,575.28
4. Step 4: Simplify right side
   72,281.04x = 3,947,425,222.52
5. Step 5: Solve for x
   x = 3,947,425,222.52/72,281.04
6. Step 6: Final answer
   x = 54,612.18