Finding the Third Proportional to 443,446 and 685,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,446 : 685,116.50 = 685,116.50 : x
2. Step 2: Convert to fraction form
   443,446/685,116.50 = 685,116.50/x
3. Step 3: Cross multiply
   443,446x = 685,116.50 × 685,116.50
4. Step 4: Simplify right side
   443,446x = 469,384,618,572.25
5. Step 5: Solve for x
   x = 469,384,618,572.25/443,446
6. Step 6: Final answer
   x = 1,058,493.30