Finding the Fourth Proportional to 71,880.88, 99,196.29 and 39,616.67

Step by Step Solution

1. Step 1: Write the proportion equation
   71,880.88 : 99,196.29 = 39,616.67 : x
2. Step 2: Convert to fraction form
   71,880.88/99,196.29 = 39,616.67/x
3. Step 3: Cross multiply
   71,880.88x = 99,196.29 × 39,616.67
4. Step 4: Simplify right side
   71,880.88x = 3,929,826,686.15
5. Step 5: Solve for x
   x = 3,929,826,686.15/71,880.88
6. Step 6: Final answer
   x = 54,671.38