Finding the Fourth Proportional to 71,812.96, 99,105.82 and 39,981.16

Step by Step Solution

1. Step 1: Write the proportion equation
   71,812.96 : 99,105.82 = 39,981.16 : x
2. Step 2: Convert to fraction form
   71,812.96/99,105.82 = 39,981.16/x
3. Step 3: Cross multiply
   71,812.96x = 99,105.82 × 39,981.16
4. Step 4: Simplify right side
   71,812.96x = 3,962,365,646.35
5. Step 5: Solve for x
   x = 3,962,365,646.35/71,812.96
6. Step 6: Final answer
   x = 55,176.19