Finding the Third Proportional to 3,940,992 and 8,471,352

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,992 : 8,471,352 = 8,471,352 : x
2. Step 2: Convert to fraction form
   3,940,992/8,471,352 = 8,471,352/x
3. Step 3: Cross multiply
   3,940,992x = 8,471,352 × 8,471,352
4. Step 4: Simplify right side
   3,940,992x = 71,763,804,707,904
5. Step 5: Solve for x
   x = 71,763,804,707,904/3,940,992
6. Step 6: Final answer
   x = 18,209,578.88