Finding the Third Proportional to 321,439.50 and 700,024.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321,439.50 : 700,024.50 = 700,024.50 : x
2. Step 2: Convert to fraction form
   321,439.50/700,024.50 = 700,024.50/x
3. Step 3: Cross multiply
   321,439.50x = 700,024.50 × 700,024.50
4. Step 4: Simplify right side
   321,439.50x = 490,034,300,600.25
5. Step 5: Solve for x
   x = 490,034,300,600.25/321,439.50
6. Step 6: Final answer
   x = 1,524,499.32