Finding the Third Proportional to 300,650 and 647,812

Step by Step Solution

1. Step 1: Write the proportion equation
   300,650 : 647,812 = 647,812 : x
2. Step 2: Convert to fraction form
   300,650/647,812 = 647,812/x
3. Step 3: Cross multiply
   300,650x = 647,812 × 647,812
4. Step 4: Simplify right side
   300,650x = 419,660,387,344
5. Step 5: Solve for x
   x = 419,660,387,344/300,650
6. Step 6: Final answer
   x = 1,395,843.63