Finding the Third Proportional to 3,928,219 and 8,456,792

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928,219 : 8,456,792 = 8,456,792 : x
2. Step 2: Convert to fraction form
   3,928,219/8,456,792 = 8,456,792/x
3. Step 3: Cross multiply
   3,928,219x = 8,456,792 × 8,456,792
4. Step 4: Simplify right side
   3,928,219x = 71,517,330,931,264
5. Step 5: Solve for x
   x = 71,517,330,931,264/3,928,219
6. Step 6: Final answer
   x = 18,206,044.76