Finding the Fourth Proportional to 140,640.93, 194,084.15 and 76,978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   140,640.93 : 194,084.15 = 76,978.17 : x
2. Step 2: Convert to fraction form
   140,640.93/194,084.15 = 76,978.17/x
3. Step 3: Cross multiply
   140,640.93x = 194,084.15 × 76,978.17
4. Step 4: Simplify right side
   140,640.93x = 14,940,241,722.58
5. Step 5: Solve for x
   x = 14,940,241,722.58/140,640.93
6. Step 6: Final answer
   x = 106,229.69