Finding the Fourth Proportional to 146.28, 201.89 and 88.10

Step by Step Solution

1. Step 1: Write the proportion equation
   146.28 : 201.89 = 88.10 : x
2. Step 2: Convert to fraction form
   146.28/201.89 = 88.10/x
3. Step 3: Cross multiply
   146.28x = 201.89 × 88.10
4. Step 4: Simplify right side
   146.28x = 17,785.72
5. Step 5: Solve for x
   x = 17,785.72/146.28
6. Step 6: Final answer
   x = 121.59