Finding the Third Proportional to 3,939,168 and 8,568,516

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,168 : 8,568,516 = 8,568,516 : x
2. Step 2: Convert to fraction form
   3,939,168/8,568,516 = 8,568,516/x
3. Step 3: Cross multiply
   3,939,168x = 8,568,516 × 8,568,516
4. Step 4: Simplify right side
   3,939,168x = 73,419,466,442,256
5. Step 5: Solve for x
   x = 73,419,466,442,256/3,939,168
6. Step 6: Final answer
   x = 18,638,318.15