Finding the Third Proportional to 326,500.50 and 494,689

Step by Step Solution

1. Step 1: Write the proportion equation
   326,500.50 : 494,689 = 494,689 : x
2. Step 2: Convert to fraction form
   326,500.50/494,689 = 494,689/x
3. Step 3: Cross multiply
   326,500.50x = 494,689 × 494,689
4. Step 4: Simplify right side
   326,500.50x = 244,717,206,721
5. Step 5: Solve for x
   x = 244,717,206,721/326,500.50
6. Step 6: Final answer
   x = 749,515.56