Finding the Fourth Proportional to 72,453.72, 99,986.13 and 40,622.61

Step by Step Solution

1. Step 1: Write the proportion equation
   72,453.72 : 99,986.13 = 40,622.61 : x
2. Step 2: Convert to fraction form
   72,453.72/99,986.13 = 40,622.61/x
3. Step 3: Cross multiply
   72,453.72x = 99,986.13 × 40,622.61
4. Step 4: Simplify right side
   72,453.72x = 4,061,697,564.40
5. Step 5: Solve for x
   x = 4,061,697,564.40/72,453.72
6. Step 6: Final answer
   x = 56,059.20