Finding the Third Proportional to 2,555,431 and 5,629,369

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555,431 : 5,629,369 = 5,629,369 : x
2. Step 2: Convert to fraction form
   2,555,431/5,629,369 = 5,629,369/x
3. Step 3: Cross multiply
   2,555,431x = 5,629,369 × 5,629,369
4. Step 4: Simplify right side
   2,555,431x = 31,689,795,338,161
5. Step 5: Solve for x
   x = 31,689,795,338,161/2,555,431
6. Step 6: Final answer
   x = 12,400,959.11