Finding the Third Proportional to 309,217.50 and 441,002.25

Step by Step Solution

1. Step 1: Write the proportion equation
   309,217.50 : 441,002.25 = 441,002.25 : x
2. Step 2: Convert to fraction form
   309,217.50/441,002.25 = 441,002.25/x
3. Step 3: Cross multiply
   309,217.50x = 441,002.25 × 441,002.25
4. Step 4: Simplify right side
   309,217.50x = 194,482,984,505.06
5. Step 5: Solve for x
   x = 194,482,984,505.06/309,217.50
6. Step 6: Final answer
   x = 628,952.06