Finding the Fourth Proportional to 72,285.50, 99,815.55 and 45,472.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,285.50 : 99,815.55 = 45,472.88 : x
2. Step 2: Convert to fraction form
   72,285.50/99,815.55 = 45,472.88/x
3. Step 3: Cross multiply
   72,285.50x = 99,815.55 × 45,472.88
4. Step 4: Simplify right side
   72,285.50x = 4,538,900,527.28
5. Step 5: Solve for x
   x = 4,538,900,527.28/72,285.50
6. Step 6: Final answer
   x = 62,791.30