Finding the Third Proportional to 4,431,623 and 9,639,694

Step by Step Solution

1. Step 1: Write the proportion equation
   4,431,623 : 9,639,694 = 9,639,694 : x
2. Step 2: Convert to fraction form
   4,431,623/9,639,694 = 9,639,694/x
3. Step 3: Cross multiply
   4,431,623x = 9,639,694 × 9,639,694
4. Step 4: Simplify right side
   4,431,623x = 92,923,700,413,636
5. Step 5: Solve for x
   x = 92,923,700,413,636/4,431,623
6. Step 6: Final answer
   x = 20,968,322.53