Finding the Fourth Proportional to 140,641.30, 194,084.67 and 76,978.54

Step by Step Solution

1. Step 1: Write the proportion equation
   140,641.30 : 194,084.67 = 76,978.54 : x
2. Step 2: Convert to fraction form
   140,641.30/194,084.67 = 76,978.54/x
3. Step 3: Cross multiply
   140,641.30x = 194,084.67 × 76,978.54
4. Step 4: Simplify right side
   140,641.30x = 14,940,354,532.98
5. Step 5: Solve for x
   x = 14,940,354,532.98/140,641.30
6. Step 6: Final answer
   x = 106,230.21