Finding the Third Proportional to 325,998 and 687,394.50

Step by Step Solution

1. Step 1: Write the proportion equation
   325,998 : 687,394.50 = 687,394.50 : x
2. Step 2: Convert to fraction form
   325,998/687,394.50 = 687,394.50/x
3. Step 3: Cross multiply
   325,998x = 687,394.50 × 687,394.50
4. Step 4: Simplify right side
   325,998x = 472,511,198,630.25
5. Step 5: Solve for x
   x = 472,511,198,630.25/325,998
6. Step 6: Final answer
   x = 1,449,429.75