Finding the Third Proportional to 2,278,449 and 5,378,496

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278,449 : 5,378,496 = 5,378,496 : x
2. Step 2: Convert to fraction form
   2,278,449/5,378,496 = 5,378,496/x
3. Step 3: Cross multiply
   2,278,449x = 5,378,496 × 5,378,496
4. Step 4: Simplify right side
   2,278,449x = 28,928,219,222,016
5. Step 5: Solve for x
   x = 28,928,219,222,016/2,278,449
6. Step 6: Final answer
   x = 12,696,452.38