Finding the Third Proportional to 3,940,994 and 8,471,356

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,994 : 8,471,356 = 8,471,356 : x
2. Step 2: Convert to fraction form
   3,940,994/8,471,356 = 8,471,356/x
3. Step 3: Cross multiply
   3,940,994x = 8,471,356 × 8,471,356
4. Step 4: Simplify right side
   3,940,994x = 71,763,872,478,736
5. Step 5: Solve for x
   x = 71,763,872,478,736/3,940,994
6. Step 6: Final answer
   x = 18,209,586.84