Finding the Fourth Proportional to 140,641.05, 194,084.33 and 76,978.29

Step by Step Solution

1. Step 1: Write the proportion equation
   140,641.05 : 194,084.33 = 76,978.29 : x
2. Step 2: Convert to fraction form
   140,641.05/194,084.33 = 76,978.29/x
3. Step 3: Cross multiply
   140,641.05x = 194,084.33 × 76,978.29
4. Step 4: Simplify right side
   140,641.05x = 14,940,279,454.30
5. Step 5: Solve for x
   x = 14,940,279,454.30/140,641.05
6. Step 6: Final answer
   x = 106,229.86