Finding the Third Proportional to 3,990,807 and 9,046,995

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,807 : 9,046,995 = 9,046,995 : x
2. Step 2: Convert to fraction form
   3,990,807/9,046,995 = 9,046,995/x
3. Step 3: Cross multiply
   3,990,807x = 9,046,995 × 9,046,995
4. Step 4: Simplify right side
   3,990,807x = 81,848,118,530,025
5. Step 5: Solve for x
   x = 81,848,118,530,025/3,990,807
6. Step 6: Final answer
   x = 20,509,164.82