Finding the Third Proportional to 457,909.50 and 673,144.50

Step by Step Solution

1. Step 1: Write the proportion equation
   457,909.50 : 673,144.50 = 673,144.50 : x
2. Step 2: Convert to fraction form
   457,909.50/673,144.50 = 673,144.50/x
3. Step 3: Cross multiply
   457,909.50x = 673,144.50 × 673,144.50
4. Step 4: Simplify right side
   457,909.50x = 453,123,517,880.25
5. Step 5: Solve for x
   x = 453,123,517,880.25/457,909.50
6. Step 6: Final answer
   x = 989,548.19