Finding the Third Proportional to 309,863.25 and 656,932.50

Step by Step Solution

1. Step 1: Write the proportion equation
   309,863.25 : 656,932.50 = 656,932.50 : x
2. Step 2: Convert to fraction form
   309,863.25/656,932.50 = 656,932.50/x
3. Step 3: Cross multiply
   309,863.25x = 656,932.50 × 656,932.50
4. Step 4: Simplify right side
   309,863.25x = 431,560,309,556.25
5. Step 5: Solve for x
   x = 431,560,309,556.25/309,863.25
6. Step 6: Final answer
   x = 1,392,744.41