Finding the Third Proportional to 443,443.78 and 685,113.19

Step by Step Solution

1. Step 1: Write the proportion equation
   443,443.78 : 685,113.19 = 685,113.19 : x
2. Step 2: Convert to fraction form
   443,443.78/685,113.19 = 685,113.19/x
3. Step 3: Cross multiply
   443,443.78x = 685,113.19 × 685,113.19
4. Step 4: Simplify right side
   443,443.78x = 469,380,079,686.41
5. Step 5: Solve for x
   x = 469,380,079,686.41/443,443.78
6. Step 6: Final answer
   x = 1,058,488.36