Finding the Third Proportional to 321,259.50 and 699,723

Step by Step Solution

1. Step 1: Write the proportion equation
   321,259.50 : 699,723 = 699,723 : x
2. Step 2: Convert to fraction form
   321,259.50/699,723 = 699,723/x
3. Step 3: Cross multiply
   321,259.50x = 699,723 × 699,723
4. Step 4: Simplify right side
   321,259.50x = 489,612,276,729
5. Step 5: Solve for x
   x = 489,612,276,729/321,259.50
6. Step 6: Final answer
   x = 1,524,039.84