Finding the Fourth Proportional to 92,721.24, 139,132.32 and 39,404.88

Step by Step Solution

1. Step 1: Write the proportion equation
   92,721.24 : 139,132.32 = 39,404.88 : x
2. Step 2: Convert to fraction form
   92,721.24/139,132.32 = 39,404.88/x
3. Step 3: Cross multiply
   92,721.24x = 139,132.32 × 39,404.88
4. Step 4: Simplify right side
   92,721.24x = 5,482,492,373.72
5. Step 5: Solve for x
   x = 5,482,492,373.72/92,721.24
6. Step 6: Final answer
   x = 59,128.76