Finding the Fourth Proportional to 89,016.85, 134,150.13 and 80,141.05

Step by Step Solution

1. Step 1: Write the proportion equation
   89,016.85 : 134,150.13 = 80,141.05 : x
2. Step 2: Convert to fraction form
   89,016.85/134,150.13 = 80,141.05/x
3. Step 3: Cross multiply
   89,016.85x = 134,150.13 × 80,141.05
4. Step 4: Simplify right side
   89,016.85x = 10,750,932,105.43
5. Step 5: Solve for x
   x = 10,750,932,105.43/89,016.85
6. Step 6: Final answer
   x = 120,774.12