Finding the Third Proportional to 3,864,218 and 8,474,928

Step by Step Solution

1. Step 1: Write the proportion equation
   3,864,218 : 8,474,928 = 8,474,928 : x
2. Step 2: Convert to fraction form
   3,864,218/8,474,928 = 8,474,928/x
3. Step 3: Cross multiply
   3,864,218x = 8,474,928 × 8,474,928
4. Step 4: Simplify right side
   3,864,218x = 71,824,404,605,184
5. Step 5: Solve for x
   x = 71,824,404,605,184/3,864,218
6. Step 6: Final answer
   x = 18,587,047.78