Finding the Third Proportional to 398,757 and 568,759.50

Step by Step Solution

1. Step 1: Write the proportion equation
   398,757 : 568,759.50 = 568,759.50 : x
2. Step 2: Convert to fraction form
   398,757/568,759.50 = 568,759.50/x
3. Step 3: Cross multiply
   398,757x = 568,759.50 × 568,759.50
4. Step 4: Simplify right side
   398,757x = 323,487,368,840.25
5. Step 5: Solve for x
   x = 323,487,368,840.25/398,757
6. Step 6: Final answer
   x = 811,239.35