Finding the Third Proportional to 4,039,956 and 8,647,398

Step by Step Solution

1. Step 1: Write the proportion equation
   4,039,956 : 8,647,398 = 8,647,398 : x
2. Step 2: Convert to fraction form
   4,039,956/8,647,398 = 8,647,398/x
3. Step 3: Cross multiply
   4,039,956x = 8,647,398 × 8,647,398
4. Step 4: Simplify right side
   4,039,956x = 74,777,492,170,404
5. Step 5: Solve for x
   x = 74,777,492,170,404/4,039,956
6. Step 6: Final answer
   x = 18,509,481.83