Finding the Third Proportional to 3,974,614 and 8,621,366

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974,614 : 8,621,366 = 8,621,366 : x
2. Step 2: Convert to fraction form
   3,974,614/8,621,366 = 8,621,366/x
3. Step 3: Cross multiply
   3,974,614x = 8,621,366 × 8,621,366
4. Step 4: Simplify right side
   3,974,614x = 74,327,951,705,956
5. Step 5: Solve for x
   x = 74,327,951,705,956/3,974,614
6. Step 6: Final answer
   x = 18,700,671.74