Finding the Fourth Proportional to 89.46, 134.01 and 80.82

Step by Step Solution

1. Step 1: Write the proportion equation
   89.46 : 134.01 = 80.82 : x
2. Step 2: Convert to fraction form
   89.46/134.01 = 80.82/x
3. Step 3: Cross multiply
   89.46x = 134.01 × 80.82
4. Step 4: Simplify right side
   89.46x = 10,830.69
5. Step 5: Solve for x
   x = 10,830.69/89.46
6. Step 6: Final answer
   x = 121.07