Finding the Third Proportional to 331.69 and 487.83

Step by Step Solution

1. Step 1: Write the proportion equation
   331.69 : 487.83 = 487.83 : x
2. Step 2: Convert to fraction form
   331.69/487.83 = 487.83/x
3. Step 3: Cross multiply
   331.69x = 487.83 × 487.83
4. Step 4: Simplify right side
   331.69x = 237,976.28
5. Step 5: Solve for x
   x = 237,976.28/331.69
6. Step 6: Final answer
   x = 717.47