Finding the Third Proportional to 3,923,078 and 8,447,307

Step by Step Solution

1. Step 1: Write the proportion equation
   3,923,078 : 8,447,307 = 8,447,307 : x
2. Step 2: Convert to fraction form
   3,923,078/8,447,307 = 8,447,307/x
3. Step 3: Cross multiply
   3,923,078x = 8,447,307 × 8,447,307
4. Step 4: Simplify right side
   3,923,078x = 71,356,995,552,249
5. Step 5: Solve for x
   x = 71,356,995,552,249/3,923,078
6. Step 6: Final answer
   x = 18,189,033.09