Finding the Third Proportional to 3,940,584 and 8,509,856

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,584 : 8,509,856 = 8,509,856 : x
2. Step 2: Convert to fraction form
   3,940,584/8,509,856 = 8,509,856/x
3. Step 3: Cross multiply
   3,940,584x = 8,509,856 × 8,509,856
4. Step 4: Simplify right side
   3,940,584x = 72,417,649,140,736
5. Step 5: Solve for x
   x = 72,417,649,140,736/3,940,584
6. Step 6: Final answer
   x = 18,377,390.04