Finding the Third Proportional to 3,990,624 and 9,660,912

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,624 : 9,660,912 = 9,660,912 : x
2. Step 2: Convert to fraction form
   3,990,624/9,660,912 = 9,660,912/x
3. Step 3: Cross multiply
   3,990,624x = 9,660,912 × 9,660,912
4. Step 4: Simplify right side
   3,990,624x = 93,333,220,671,744
5. Step 5: Solve for x
   x = 93,333,220,671,744/3,990,624
6. Step 6: Final answer
   x = 23,388,126.94