Finding the Third Proportional to 3,974,978 and 8,579,452

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974,978 : 8,579,452 = 8,579,452 : x
2. Step 2: Convert to fraction form
   3,974,978/8,579,452 = 8,579,452/x
3. Step 3: Cross multiply
   3,974,978x = 8,579,452 × 8,579,452
4. Step 4: Simplify right side
   3,974,978x = 73,606,996,620,304
5. Step 5: Solve for x
   x = 73,606,996,620,304/3,974,978
6. Step 6: Final answer
   x = 18,517,585.91