Finding the Third Proportional to 2,560,668 and 5,518,316

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560,668 : 5,518,316 = 5,518,316 : x
2. Step 2: Convert to fraction form
   2,560,668/5,518,316 = 5,518,316/x
3. Step 3: Cross multiply
   2,560,668x = 5,518,316 × 5,518,316
4. Step 4: Simplify right side
   2,560,668x = 30,451,811,475,856
5. Step 5: Solve for x
   x = 30,451,811,475,856/2,560,668
6. Step 6: Final answer
   x = 11,892,135.75