Finding the Third Proportional to 3,939,177 and 8,568,538

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,177 : 8,568,538 = 8,568,538 : x
2. Step 2: Convert to fraction form
   3,939,177/8,568,538 = 8,568,538/x
3. Step 3: Cross multiply
   3,939,177x = 8,568,538 × 8,568,538
4. Step 4: Simplify right side
   3,939,177x = 73,419,843,457,444
5. Step 5: Solve for x
   x = 73,419,843,457,444/3,939,177
6. Step 6: Final answer
   x = 18,638,371.28