Finding the Third Proportional to 3,939,154 and 8,568,488

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,154 : 8,568,488 = 8,568,488 : x
2. Step 2: Convert to fraction form
   3,939,154/8,568,488 = 8,568,488/x
3. Step 3: Cross multiply
   3,939,154x = 8,568,488 × 8,568,488
4. Step 4: Simplify right side
   3,939,154x = 73,418,986,606,144
5. Step 5: Solve for x
   x = 73,418,986,606,144/3,939,154
6. Step 6: Final answer
   x = 18,638,262.58