Finding the Third Proportional to 4,420,128 and 9,486,105

Step by Step Solution

1. Step 1: Write the proportion equation
   4,420,128 : 9,486,105 = 9,486,105 : x
2. Step 2: Convert to fraction form
   4,420,128/9,486,105 = 9,486,105/x
3. Step 3: Cross multiply
   4,420,128x = 9,486,105 × 9,486,105
4. Step 4: Simplify right side
   4,420,128x = 89,986,188,071,025
5. Step 5: Solve for x
   x = 89,986,188,071,025/4,420,128
6. Step 6: Final answer
   x = 20,358,276.52