Finding the Third Proportional to 3,928,228 and 8,456,808

Step by Step Solution

1. Step 1: Write the proportion equation
   3,928,228 : 8,456,808 = 8,456,808 : x
2. Step 2: Convert to fraction form
   3,928,228/8,456,808 = 8,456,808/x
3. Step 3: Cross multiply
   3,928,228x = 8,456,808 × 8,456,808
4. Step 4: Simplify right side
   3,928,228x = 71,517,601,548,864
5. Step 5: Solve for x
   x = 71,517,601,548,864/3,928,228
6. Step 6: Final answer
   x = 18,206,071.94