Finding the Fourth Proportional to 140,644.69, 194,091.50 and 76,981.12

Step by Step Solution

1. Step 1: Write the proportion equation
   140,644.69 : 194,091.50 = 76,981.12 : x
2. Step 2: Convert to fraction form
   140,644.69/194,091.50 = 76,981.12/x
3. Step 3: Cross multiply
   140,644.69x = 194,091.50 × 76,981.12
4. Step 4: Simplify right side
   140,644.69x = 14,941,380,759.70
5. Step 5: Solve for x
   x = 14,941,380,759.70/140,644.69
6. Step 6: Final answer
   x = 106,234.95