Finding the Fourth Proportional to 72,455.72, 99,988.89 and 40,624.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,455.72 : 99,988.89 = 40,624.61 : x
2. Step 2: Convert to fraction form
   72,455.72/99,988.89 = 40,624.61/x
3. Step 3: Cross multiply
   72,455.72x = 99,988.89 × 40,624.61
4. Step 4: Simplify right side
   72,455.72x = 4,062,009,660.58
5. Step 5: Solve for x
   x = 4,062,009,660.58/72,455.72
6. Step 6: Final answer
   x = 56,061.96