Finding the Third Proportional to 3,894,510 and 8,474,778

Step by Step Solution

1. Step 1: Write the proportion equation
   3,894,510 : 8,474,778 = 8,474,778 : x
2. Step 2: Convert to fraction form
   3,894,510/8,474,778 = 8,474,778/x
3. Step 3: Cross multiply
   3,894,510x = 8,474,778 × 8,474,778
4. Step 4: Simplify right side
   3,894,510x = 71,821,862,149,284
5. Step 5: Solve for x
   x = 71,821,862,149,284/3,894,510
6. Step 6: Final answer
   x = 18,441,822.50