Finding the Third Proportional to 2,578,251 and 5,615,286

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578,251 : 5,615,286 = 5,615,286 : x
2. Step 2: Convert to fraction form
   2,578,251/5,615,286 = 5,615,286/x
3. Step 3: Cross multiply
   2,578,251x = 5,615,286 × 5,615,286
4. Step 4: Simplify right side
   2,578,251x = 31,531,436,861,796
5. Step 5: Solve for x
   x = 31,531,436,861,796/2,578,251
6. Step 6: Final answer
   x = 12,229,777.81