Finding the Third Proportional to 4,431,576 and 9,639,606

Step by Step Solution

1. Step 1: Write the proportion equation
   4,431,576 : 9,639,606 = 9,639,606 : x
2. Step 2: Convert to fraction form
   4,431,576/9,639,606 = 9,639,606/x
3. Step 3: Cross multiply
   4,431,576x = 9,639,606 × 9,639,606
4. Step 4: Simplify right side
   4,431,576x = 92,922,003,835,236
5. Step 5: Solve for x
   x = 92,922,003,835,236/4,431,576
6. Step 6: Final answer
   x = 20,968,162.08