Finding the Third Proportional to 3,950,719 and 8,656,389

Step by Step Solution

1. Step 1: Write the proportion equation
   3,950,719 : 8,656,389 = 8,656,389 : x
2. Step 2: Convert to fraction form
   3,950,719/8,656,389 = 8,656,389/x
3. Step 3: Cross multiply
   3,950,719x = 8,656,389 × 8,656,389
4. Step 4: Simplify right side
   3,950,719x = 74,933,070,519,321
5. Step 5: Solve for x
   x = 74,933,070,519,321/3,950,719
6. Step 6: Final answer
   x = 18,966,945.14