Finding the Third Proportional to 2,578,860 and 5,605,479

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578,860 : 5,605,479 = 5,605,479 : x
2. Step 2: Convert to fraction form
   2,578,860/5,605,479 = 5,605,479/x
3. Step 3: Cross multiply
   2,578,860x = 5,605,479 × 5,605,479
4. Step 4: Simplify right side
   2,578,860x = 31,421,394,819,441
5. Step 5: Solve for x
   x = 31,421,394,819,441/2,578,860
6. Step 6: Final answer
   x = 12,184,218.93