Finding the Third Proportional to 3,939,166 and 8,568,513

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,166 : 8,568,513 = 8,568,513 : x
2. Step 2: Convert to fraction form
   3,939,166/8,568,513 = 8,568,513/x
3. Step 3: Cross multiply
   3,939,166x = 8,568,513 × 8,568,513
4. Step 4: Simplify right side
   3,939,166x = 73,419,415,031,169
5. Step 5: Solve for x
   x = 73,419,415,031,169/3,939,166
6. Step 6: Final answer
   x = 18,638,314.56