Finding the Third Proportional to 3,939,172 and 8,568,528

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939,172 : 8,568,528 = 8,568,528 : x
2. Step 2: Convert to fraction form
   3,939,172/8,568,528 = 8,568,528/x
3. Step 3: Cross multiply
   3,939,172x = 8,568,528 × 8,568,528
4. Step 4: Simplify right side
   3,939,172x = 73,419,672,086,784
5. Step 5: Solve for x
   x = 73,419,672,086,784/3,939,172
6. Step 6: Final answer
   x = 18,638,351.43