Finding the Third Proportional to 443,446.13 and 685,116.56

Step by Step Solution

1. Step 1: Write the proportion equation
   443,446.13 : 685,116.56 = 685,116.56 : x
2. Step 2: Convert to fraction form
   443,446.13/685,116.56 = 685,116.56/x
3. Step 3: Cross multiply
   443,446.13x = 685,116.56 × 685,116.56
4. Step 4: Simplify right side
   443,446.13x = 469,384,704,211.82
5. Step 5: Solve for x
   x = 469,384,704,211.82/443,446.13
6. Step 6: Final answer
   x = 1,058,493.19