Finding the Fourth Proportional to 72,204.76, 99,612.33 and 56,261.53

Step by Step Solution

1. Step 1: Write the proportion equation
   72,204.76 : 99,612.33 = 56,261.53 : x
2. Step 2: Convert to fraction form
   72,204.76/99,612.33 = 56,261.53/x
3. Step 3: Cross multiply
   72,204.76x = 99,612.33 × 56,261.53
4. Step 4: Simplify right side
   72,204.76x = 5,604,342,092.66
5. Step 5: Solve for x
   x = 5,604,342,092.66/72,204.76
6. Step 6: Final answer
   x = 77,617.35