Finding the Third Proportional to 3,974,622 and 8,621,382

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974,622 : 8,621,382 = 8,621,382 : x
2. Step 2: Convert to fraction form
   3,974,622/8,621,382 = 8,621,382/x
3. Step 3: Cross multiply
   3,974,622x = 8,621,382 × 8,621,382
4. Step 4: Simplify right side
   3,974,622x = 74,328,227,589,924
5. Step 5: Solve for x
   x = 74,328,227,589,924/3,974,622
6. Step 6: Final answer
   x = 18,700,703.51