Finding the Fourth Proportional to 87,616.50, 120,910.78 and 47,872.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,616.50 : 120,910.78 = 47,872.50 : x
2. Step 2: Convert to fraction form
   87,616.50/120,910.78 = 47,872.50/x
3. Step 3: Cross multiply
   87,616.50x = 120,910.78 × 47,872.50
4. Step 4: Simplify right side
   87,616.50x = 5,788,301,315.55
5. Step 5: Solve for x
   x = 5,788,301,315.55/87,616.50
6. Step 6: Final answer
   x = 66,064.06