Finding the Third Proportional to 316,408.50 and 682,542

Step by Step Solution

1. Step 1: Write the proportion equation
   316,408.50 : 682,542 = 682,542 : x
2. Step 2: Convert to fraction form
   316,408.50/682,542 = 682,542/x
3. Step 3: Cross multiply
   316,408.50x = 682,542 × 682,542
4. Step 4: Simplify right side
   316,408.50x = 465,863,581,764
5. Step 5: Solve for x
   x = 465,863,581,764/316,408.50
6. Step 6: Final answer
   x = 1,472,348.50