Finding the Third Proportional to 298,818 and 649,800

Step by Step Solution

1. Step 1: Write the proportion equation
   298,818 : 649,800 = 649,800 : x
2. Step 2: Convert to fraction form
   298,818/649,800 = 649,800/x
3. Step 3: Cross multiply
   298,818x = 649,800 × 649,800
4. Step 4: Simplify right side
   298,818x = 422,240,040,000
5. Step 5: Solve for x
   x = 422,240,040,000/298,818
6. Step 6: Final answer
   x = 1,413,034.15