Finding the Third Proportional to 2,566,278 and 5,511,636

Step by Step Solution

1. Step 1: Write the proportion equation
   2,566,278 : 5,511,636 = 5,511,636 : x
2. Step 2: Convert to fraction form
   2,566,278/5,511,636 = 5,511,636/x
3. Step 3: Cross multiply
   2,566,278x = 5,511,636 × 5,511,636
4. Step 4: Simplify right side
   2,566,278x = 30,378,131,396,496
5. Step 5: Solve for x
   x = 30,378,131,396,496/2,566,278
6. Step 6: Final answer
   x = 11,837,428.13