Finding the Third Proportional to 4,431,565 and 9,639,584

Step by Step Solution

1. Step 1: Write the proportion equation
   4,431,565 : 9,639,584 = 9,639,584 : x
2. Step 2: Convert to fraction form
   4,431,565/9,639,584 = 9,639,584/x
3. Step 3: Cross multiply
   4,431,565x = 9,639,584 × 9,639,584
4. Step 4: Simplify right side
   4,431,565x = 92,921,579,693,056
5. Step 5: Solve for x
   x = 92,921,579,693,056/4,431,565
6. Step 6: Final answer
   x = 20,968,118.42