Finding the Third Proportional to 443,445 and 685,115.25

Step by Step Solution

1. Step 1: Write the proportion equation
   443,445 : 685,115.25 = 685,115.25 : x
2. Step 2: Convert to fraction form
   443,445/685,115.25 = 685,115.25/x
3. Step 3: Cross multiply
   443,445x = 685,115.25 × 685,115.25
4. Step 4: Simplify right side
   443,445x = 469,382,905,782.56
5. Step 5: Solve for x
   x = 469,382,905,782.56/443,445
6. Step 6: Final answer
   x = 1,058,491.82