Finding the Third Proportional to 4,018,149 and 8,428,626

Step by Step Solution

1. Step 1: Write the proportion equation
   4,018,149 : 8,428,626 = 8,428,626 : x
2. Step 2: Convert to fraction form
   4,018,149/8,428,626 = 8,428,626/x
3. Step 3: Cross multiply
   4,018,149x = 8,428,626 × 8,428,626
4. Step 4: Simplify right side
   4,018,149x = 71,041,736,247,876
5. Step 5: Solve for x
   x = 71,041,736,247,876/4,018,149
6. Step 6: Final answer
   x = 17,680,214.51