Finding the Third Proportional to 131.72 and 199.36

Step by Step Solution

1. Step 1: Write the proportion equation
   131.72 : 199.36 = 199.36 : x
2. Step 2: Convert to fraction form
   131.72/199.36 = 199.36/x
3. Step 3: Cross multiply
   131.72x = 199.36 × 199.36
4. Step 4: Simplify right side
   131.72x = 39,744.16
5. Step 5: Solve for x
   x = 39,744.16/131.72
6. Step 6: Final answer
   x = 301.74