Finding the Third Proportional to 300,660 and 647,832

Step by Step Solution

1. Step 1: Write the proportion equation
   300,660 : 647,832 = 647,832 : x
2. Step 2: Convert to fraction form
   300,660/647,832 = 647,832/x
3. Step 3: Cross multiply
   300,660x = 647,832 × 647,832
4. Step 4: Simplify right side
   300,660x = 419,686,300,224
5. Step 5: Solve for x
   x = 419,686,300,224/300,660
6. Step 6: Final answer
   x = 1,395,883.39