Finding the Fourth Proportional to 140,761.92, 194,251.50 and 77,100.78

Step by Step Solution

1. Step 1: Write the proportion equation
   140,761.92 : 194,251.50 = 77,100.78 : x
2. Step 2: Convert to fraction form
   140,761.92/194,251.50 = 77,100.78/x
3. Step 3: Cross multiply
   140,761.92x = 194,251.50 × 77,100.78
4. Step 4: Simplify right side
   140,761.92x = 14,976,942,166.17
5. Step 5: Solve for x
   x = 14,976,942,166.17/140,761.92
6. Step 6: Final answer
   x = 106,399.10