Finding the Fourth Proportional to 89.94, 134.27 and 80.82

Step by Step Solution

1. Step 1: Write the proportion equation
   89.94 : 134.27 = 80.82 : x
2. Step 2: Convert to fraction form
   89.94/134.27 = 80.82/x
3. Step 3: Cross multiply
   89.94x = 134.27 × 80.82
4. Step 4: Simplify right side
   89.94x = 10,851.30
5. Step 5: Solve for x
   x = 10,851.30/89.94
6. Step 6: Final answer
   x = 120.65