Finding the Third Proportional to 4,403,421 and 9,108,907

Step by Step Solution

1. Step 1: Write the proportion equation
   4,403,421 : 9,108,907 = 9,108,907 : x
2. Step 2: Convert to fraction form
   4,403,421/9,108,907 = 9,108,907/x
3. Step 3: Cross multiply
   4,403,421x = 9,108,907 × 9,108,907
4. Step 4: Simplify right side
   4,403,421x = 82,972,186,734,649
5. Step 5: Solve for x
   x = 82,972,186,734,649/4,403,421
6. Step 6: Final answer
   x = 18,842,664.99