Finding the Third Proportional to 425,536 and 647,520

Step by Step Solution

1. Step 1: Write the proportion equation
   425,536 : 647,520 = 647,520 : x
2. Step 2: Convert to fraction form
   425,536/647,520 = 647,520/x
3. Step 3: Cross multiply
   425,536x = 647,520 × 647,520
4. Step 4: Simplify right side
   425,536x = 419,282,150,400
5. Step 5: Solve for x
   x = 419,282,150,400/425,536
6. Step 6: Final answer
   x = 985,303.59