Finding the Third Proportional to 440.17 and 658.89

Step by Step Solution

1. Step 1: Write the proportion equation
   440.17 : 658.89 = 658.89 : x
2. Step 2: Convert to fraction form
   440.17/658.89 = 658.89/x
3. Step 3: Cross multiply
   440.17x = 658.89 × 658.89
4. Step 4: Simplify right side
   440.17x = 434,135.57
5. Step 5: Solve for x
   x = 434,135.57/440.17
6. Step 6: Final answer
   x = 986.28