Finding the Third Proportional to 3,885,128 and 8,243,656

Step by Step Solution

1. Step 1: Write the proportion equation
   3,885,128 : 8,243,656 = 8,243,656 : x
2. Step 2: Convert to fraction form
   3,885,128/8,243,656 = 8,243,656/x
3. Step 3: Cross multiply
   3,885,128x = 8,243,656 × 8,243,656
4. Step 4: Simplify right side
   3,885,128x = 67,957,864,246,336
5. Step 5: Solve for x
   x = 67,957,864,246,336/3,885,128
6. Step 6: Final answer
   x = 17,491,795.44