Finding the Third Proportional to 309,604.50 and 682,067.25

Step by Step Solution

1. Step 1: Write the proportion equation
   309,604.50 : 682,067.25 = 682,067.25 : x
2. Step 2: Convert to fraction form
   309,604.50/682,067.25 = 682,067.25/x
3. Step 3: Cross multiply
   309,604.50x = 682,067.25 × 682,067.25
4. Step 4: Simplify right side
   309,604.50x = 465,215,733,522.56
5. Step 5: Solve for x
   x = 465,215,733,522.56/309,604.50
6. Step 6: Final answer
   x = 1,502,612.96