Finding the Third Proportional to 131.98 and 206.89

Step by Step Solution

1. Step 1: Write the proportion equation
   131.98 : 206.89 = 206.89 : x
2. Step 2: Convert to fraction form
   131.98/206.89 = 206.89/x
3. Step 3: Cross multiply
   131.98x = 206.89 × 206.89
4. Step 4: Simplify right side
   131.98x = 42,805.35
5. Step 5: Solve for x
   x = 42,805.35/131.98
6. Step 6: Final answer
   x = 324.34