Finding the Third Proportional to 320,856 and 649,500

Step by Step Solution

1. Step 1: Write the proportion equation
   320,856 : 649,500 = 649,500 : x
2. Step 2: Convert to fraction form
   320,856/649,500 = 649,500/x
3. Step 3: Cross multiply
   320,856x = 649,500 × 649,500
4. Step 4: Simplify right side
   320,856x = 421,850,250,000
5. Step 5: Solve for x
   x = 421,850,250,000/320,856
6. Step 6: Final answer
   x = 1,314,765.03