Finding the Third Proportional to 443,304 and 685,739.25

Step by Step Solution

1. Step 1: Write the proportion equation
   443,304 : 685,739.25 = 685,739.25 : x
2. Step 2: Convert to fraction form
   443,304/685,739.25 = 685,739.25/x
3. Step 3: Cross multiply
   443,304x = 685,739.25 × 685,739.25
4. Step 4: Simplify right side
   443,304x = 470,238,318,990.56
5. Step 5: Solve for x
   x = 470,238,318,990.56/443,304
6. Step 6: Final answer
   x = 1,060,758.12