Finding the Third Proportional to 3,983,914 and 8,643,368

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983,914 : 8,643,368 = 8,643,368 : x
2. Step 2: Convert to fraction form
   3,983,914/8,643,368 = 8,643,368/x
3. Step 3: Cross multiply
   3,983,914x = 8,643,368 × 8,643,368
4. Step 4: Simplify right side
   3,983,914x = 74,707,810,383,424
5. Step 5: Solve for x
   x = 74,707,810,383,424/3,983,914
6. Step 6: Final answer
   x = 18,752,365.23