Finding the Fourth Proportional to 88.21, 132.37 and 42.55

Step by Step Solution

1. Step 1: Write the proportion equation
   88.21 : 132.37 = 42.55 : x
2. Step 2: Convert to fraction form
   88.21/132.37 = 42.55/x
3. Step 3: Cross multiply
   88.21x = 132.37 × 42.55
4. Step 4: Simplify right side
   88.21x = 5,632.34
5. Step 5: Solve for x
   x = 5,632.34/88.21
6. Step 6: Final answer
   x = 63.85