Finding the Third Proportional to 298,660.50 and 649,809

Step by Step Solution

1. Step 1: Write the proportion equation
   298,660.50 : 649,809 = 649,809 : x
2. Step 2: Convert to fraction form
   298,660.50/649,809 = 649,809/x
3. Step 3: Cross multiply
   298,660.50x = 649,809 × 649,809
4. Step 4: Simplify right side
   298,660.50x = 422,251,736,481
5. Step 5: Solve for x
   x = 422,251,736,481/298,660.50
6. Step 6: Final answer
   x = 1,413,818.49