Finding the Third Proportional to 131.25 and 308.63

Step by Step Solution

1. Step 1: Write the proportion equation
   131.25 : 308.63 = 308.63 : x
2. Step 2: Convert to fraction form
   131.25/308.63 = 308.63/x
3. Step 3: Cross multiply
   131.25x = 308.63 × 308.63
4. Step 4: Simplify right side
   131.25x = 95,249.39
5. Step 5: Solve for x
   x = 95,249.39/131.25
6. Step 6: Final answer
   x = 725.71