Finding the Third Proportional to 3,940,720 and 8,489,344

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,720 : 8,489,344 = 8,489,344 : x
2. Step 2: Convert to fraction form
   3,940,720/8,489,344 = 8,489,344/x
3. Step 3: Cross multiply
   3,940,720x = 8,489,344 × 8,489,344
4. Step 4: Simplify right side
   3,940,720x = 72,068,961,550,336
5. Step 5: Solve for x
   x = 72,068,961,550,336/3,940,720
6. Step 6: Final answer
   x = 18,288,272.59