Finding the Fourth Proportional to 71,792.49, 99,071.93 and 39,960.71

Step by Step Solution

1. Step 1: Write the proportion equation
   71,792.49 : 99,071.93 = 39,960.71 : x
2. Step 2: Convert to fraction form
   71,792.49/99,071.93 = 39,960.71/x
3. Step 3: Cross multiply
   71,792.49x = 99,071.93 × 39,960.71
4. Step 4: Simplify right side
   71,792.49x = 3,958,983,968.71
5. Step 5: Solve for x
   x = 3,958,983,968.71/71,792.49
6. Step 6: Final answer
   x = 55,144.82