Finding the Fourth Proportional to 89.01, 122.94 and 80.82

Step by Step Solution

1. Step 1: Write the proportion equation
   89.01 : 122.94 = 80.82 : x
2. Step 2: Convert to fraction form
   89.01/122.94 = 80.82/x
3. Step 3: Cross multiply
   89.01x = 122.94 × 80.82
4. Step 4: Simplify right side
   89.01x = 9,936.01
5. Step 5: Solve for x
   x = 9,936.01/89.01
6. Step 6: Final answer
   x = 111.63