Finding the Third Proportional to 4,431,630 and 9,639,708

Step by Step Solution

1. Step 1: Write the proportion equation
   4,431,630 : 9,639,708 = 9,639,708 : x
2. Step 2: Convert to fraction form
   4,431,630/9,639,708 = 9,639,708/x
3. Step 3: Cross multiply
   4,431,630x = 9,639,708 × 9,639,708
4. Step 4: Simplify right side
   4,431,630x = 92,923,970,325,264
5. Step 5: Solve for x
   x = 92,923,970,325,264/4,431,630
6. Step 6: Final answer
   x = 20,968,350.32