Finding the Third Proportional to 3,983,912 and 8,643,364

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983,912 : 8,643,364 = 8,643,364 : x
2. Step 2: Convert to fraction form
   3,983,912/8,643,364 = 8,643,364/x
3. Step 3: Cross multiply
   3,983,912x = 8,643,364 × 8,643,364
4. Step 4: Simplify right side
   3,983,912x = 74,707,741,236,496
5. Step 5: Solve for x
   x = 74,707,741,236,496/3,983,912
6. Step 6: Final answer
   x = 18,752,357.29