Finding the Third Proportional to 1,299,678 and 2,898,198

Step by Step Solution

1. Step 1: Write the proportion equation
   1,299,678 : 2,898,198 = 2,898,198 : x
2. Step 2: Convert to fraction form
   1,299,678/2,898,198 = 2,898,198/x
3. Step 3: Cross multiply
   1,299,678x = 2,898,198 × 2,898,198
4. Step 4: Simplify right side
   1,299,678x = 8,399,551,647,204
5. Step 5: Solve for x
   x = 8,399,551,647,204/1,299,678
6. Step 6: Final answer
   x = 6,462,794.36