Finding the Third Proportional to 131.91 and 198.49

Step by Step Solution

1. Step 1: Write the proportion equation
   131.91 : 198.49 = 198.49 : x
2. Step 2: Convert to fraction form
   131.91/198.49 = 198.49/x
3. Step 3: Cross multiply
   131.91x = 198.49 × 198.49
4. Step 4: Simplify right side
   131.91x = 39,399.15
5. Step 5: Solve for x
   x = 39,399.15/131.91
6. Step 6: Final answer
   x = 298.69