Finding the Third Proportional to 457,830 and 673,513.50

Step by Step Solution

1. Step 1: Write the proportion equation
   457,830 : 673,513.50 = 673,513.50 : x
2. Step 2: Convert to fraction form
   457,830/673,513.50 = 673,513.50/x
3. Step 3: Cross multiply
   457,830x = 673,513.50 × 673,513.50
4. Step 4: Simplify right side
   457,830x = 453,620,434,682.25
5. Step 5: Solve for x
   x = 453,620,434,682.25/457,830
6. Step 6: Final answer
   x = 990,805.40