Finding the Third Proportional to 302,439 and 660,217.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,439 : 660,217.50 = 660,217.50 : x
2. Step 2: Convert to fraction form
   302,439/660,217.50 = 660,217.50/x
3. Step 3: Cross multiply
   302,439x = 660,217.50 × 660,217.50
4. Step 4: Simplify right side
   302,439x = 435,887,147,306.25
5. Step 5: Solve for x
   x = 435,887,147,306.25/302,439
6. Step 6: Final answer
   x = 1,441,239.88