Finding the Fourth Proportional to 131,298.88, 196,879.20 and 89,757.76

Step by Step Solution

1. Step 1: Write the proportion equation
   131,298.88 : 196,879.20 = 89,757.76 : x
2. Step 2: Convert to fraction form
   131,298.88/196,879.20 = 89,757.76/x
3. Step 3: Cross multiply
   131,298.88x = 196,879.20 × 89,757.76
4. Step 4: Simplify right side
   131,298.88x = 17,671,435,982.59
5. Step 5: Solve for x
   x = 17,671,435,982.59/131,298.88
6. Step 6: Final answer
   x = 134,589.39