Finding the Third Proportional to 3,939,180 and 8,568,543

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,180 : 8,568,543 = 8,568,543 : x
2. Step 2: Convert to fraction form
   3,939,180/8,568,543 = 8,568,543/x
3. Step 3: Cross multiply
   3,939,180x = 8,568,543 × 8,568,543
4. Step 4: Simplify right side
   3,939,180x = 73,419,929,142,849
5. Step 5: Solve for x
   x = 73,419,929,142,849/3,939,180
6. Step 6: Final answer
   x = 18,638,378.84