Finding the Third Proportional to 3,940,452 and 8,509,608

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,452 : 8,509,608 = 8,509,608 : x
2. Step 2: Convert to fraction form
   3,940,452/8,509,608 = 8,509,608/x
3. Step 3: Cross multiply
   3,940,452x = 8,509,608 × 8,509,608
4. Step 4: Simplify right side
   3,940,452x = 72,413,428,313,664
5. Step 5: Solve for x
   x = 72,413,428,313,664/3,940,452
6. Step 6: Final answer
   x = 18,376,934.50