Finding the Fourth Proportional to 89,394.37, 134,719.24 and 80,520.82

Step by Step Solution

1. Step 1: Write the proportion equation
   89,394.37 : 134,719.24 = 80,520.82 : x
2. Step 2: Convert to fraction form
   89,394.37/134,719.24 = 80,520.82/x
3. Step 3: Cross multiply
   89,394.37x = 134,719.24 × 80,520.82
4. Step 4: Simplify right side
   89,394.37x = 10,847,703,674.58
5. Step 5: Solve for x
   x = 10,847,703,674.58/89,394.37
6. Step 6: Final answer
   x = 121,346.61