Finding the Third Proportional to 2,560,660 and 5,518,300

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560,660 : 5,518,300 = 5,518,300 : x
2. Step 2: Convert to fraction form
   2,560,660/5,518,300 = 5,518,300/x
3. Step 3: Cross multiply
   2,560,660x = 5,518,300 × 5,518,300
4. Step 4: Simplify right side
   2,560,660x = 30,451,634,890,000
5. Step 5: Solve for x
   x = 30,451,634,890,000/2,560,660
6. Step 6: Final answer
   x = 11,892,103.95