Finding the Third Proportional to 326,490 and 682,500

Step by Step Solution

1. Step 1: Write the proportion equation
   326,490 : 682,500 = 682,500 : x
2. Step 2: Convert to fraction form
   326,490/682,500 = 682,500/x
3. Step 3: Cross multiply
   326,490x = 682,500 × 682,500
4. Step 4: Simplify right side
   326,490x = 465,806,250,000
5. Step 5: Solve for x
   x = 465,806,250,000/326,490
6. Step 6: Final answer
   x = 1,426,709.09