Finding the Third Proportional to 3,974,958 and 8,579,772

Step by Step Solution

1. Step 1: Write the proportion equation
   3,974,958 : 8,579,772 = 8,579,772 : x
2. Step 2: Convert to fraction form
   3,974,958/8,579,772 = 8,579,772/x
3. Step 3: Cross multiply
   3,974,958x = 8,579,772 × 8,579,772
4. Step 4: Simplify right side
   3,974,958x = 73,612,487,571,984
5. Step 5: Solve for x
   x = 73,612,487,571,984/3,974,958
6. Step 6: Final answer
   x = 18,519,060.47