Finding the Third Proportional to 323,401.50 and 680,315.25

Step by Step Solution

1. Step 1: Write the proportion equation
   323,401.50 : 680,315.25 = 680,315.25 : x
2. Step 2: Convert to fraction form
   323,401.50/680,315.25 = 680,315.25/x
3. Step 3: Cross multiply
   323,401.50x = 680,315.25 × 680,315.25
4. Step 4: Simplify right side
   323,401.50x = 462,828,839,382.56
5. Step 5: Solve for x
   x = 462,828,839,382.56/323,401.50
6. Step 6: Final answer
   x = 1,431,127.68