Finding the Fourth Proportional to 89.17, 123.02 and 88.76

Step by Step Solution

1. Step 1: Write the proportion equation
   89.17 : 123.02 = 88.76 : x
2. Step 2: Convert to fraction form
   89.17/123.02 = 88.76/x
3. Step 3: Cross multiply
   89.17x = 123.02 × 88.76
4. Step 4: Simplify right side
   89.17x = 10,919.45
5. Step 5: Solve for x
   x = 10,919.45/89.17
6. Step 6: Final answer
   x = 122.46