Finding the Third Proportional to 3,983,908 and 8,643,356

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983,908 : 8,643,356 = 8,643,356 : x
2. Step 2: Convert to fraction form
   3,983,908/8,643,356 = 8,643,356/x
3. Step 3: Cross multiply
   3,983,908x = 8,643,356 × 8,643,356
4. Step 4: Simplify right side
   3,983,908x = 74,707,602,942,736
5. Step 5: Solve for x
   x = 74,707,602,942,736/3,983,908
6. Step 6: Final answer
   x = 18,752,341.41