Finding the Fourth Proportional to 78,879.72, 108,969.17 and 68,250.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,879.72 : 108,969.17 = 68,250.90 : x
2. Step 2: Convert to fraction form
   78,879.72/108,969.17 = 68,250.90/x
3. Step 3: Cross multiply
   78,879.72x = 108,969.17 × 68,250.90
4. Step 4: Simplify right side
   78,879.72x = 7,437,243,583.50
5. Step 5: Solve for x
   x = 7,437,243,583.50/78,879.72
6. Step 6: Final answer
   x = 94,285.88