Finding the Third Proportional to 3,939,153 and 8,568,487

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,153 : 8,568,487 = 8,568,487 : x
2. Step 2: Convert to fraction form
   3,939,153/8,568,487 = 8,568,487/x
3. Step 3: Cross multiply
   3,939,153x = 8,568,487 × 8,568,487
4. Step 4: Simplify right side
   3,939,153x = 73,418,969,469,169
5. Step 5: Solve for x
   x = 73,418,969,469,169/3,939,153
6. Step 6: Final answer
   x = 18,638,262.96