Finding the Third Proportional to 4,387,328 and 9,782,872

Step by Step Solution

1. Step 1: Write the proportion equation
   4,387,328 : 9,782,872 = 9,782,872 : x
2. Step 2: Convert to fraction form
   4,387,328/9,782,872 = 9,782,872/x
3. Step 3: Cross multiply
   4,387,328x = 9,782,872 × 9,782,872
4. Step 4: Simplify right side
   4,387,328x = 95,704,584,568,384
5. Step 5: Solve for x
   x = 95,704,584,568,384/4,387,328
6. Step 6: Final answer
   x = 21,813,865.88