Finding the Third Proportional to 3,939,169 and 8,568,518

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,169 : 8,568,518 = 8,568,518 : x
2. Step 2: Convert to fraction form
   3,939,169/8,568,518 = 8,568,518/x
3. Step 3: Cross multiply
   3,939,169x = 8,568,518 × 8,568,518
4. Step 4: Simplify right side
   3,939,169x = 73,419,500,716,324
5. Step 5: Solve for x
   x = 73,419,500,716,324/3,939,169
6. Step 6: Final answer
   x = 18,638,322.12