Finding the Fourth Proportional to 125,978.79, 173,789.50 and 80,620.41

Step by Step Solution

1. Step 1: Write the proportion equation
   125,978.79 : 173,789.50 = 80,620.41 : x
2. Step 2: Convert to fraction form
   125,978.79/173,789.50 = 80,620.41/x
3. Step 3: Cross multiply
   125,978.79x = 173,789.50 × 80,620.41
4. Step 4: Simplify right side
   125,978.79x = 14,010,981,345.02
5. Step 5: Solve for x
   x = 14,010,981,345.02/125,978.79
6. Step 6: Final answer
   x = 111,216.98