Finding the Third Proportional to 4,431,602 and 9,639,655

Step by Step Solution

1. Step 1: Write the proportion equation
   4,431,602 : 9,639,655 = 9,639,655 : x
2. Step 2: Convert to fraction form
   4,431,602/9,639,655 = 9,639,655/x
3. Step 3: Cross multiply
   4,431,602x = 9,639,655 × 9,639,655
4. Step 4: Simplify right side
   4,431,602x = 92,922,948,519,025
5. Step 5: Solve for x
   x = 92,922,948,519,025/4,431,602
6. Step 6: Final answer
   x = 20,968,252.23