Finding the Fourth Proportional to 131.50, 197.31 and 88.15

Step by Step Solution

1. Step 1: Write the proportion equation
   131.50 : 197.31 = 88.15 : x
2. Step 2: Convert to fraction form
   131.50/197.31 = 88.15/x
3. Step 3: Cross multiply
   131.50x = 197.31 × 88.15
4. Step 4: Simplify right side
   131.50x = 17,392.88
5. Step 5: Solve for x
   x = 17,392.88/131.50
6. Step 6: Final answer
   x = 132.27