Finding the Third Proportional to 225,678 and 490,722

Step by Step Solution

1. Step 1: Write the proportion equation
   225,678 : 490,722 = 490,722 : x
2. Step 2: Convert to fraction form
   225,678/490,722 = 490,722/x
3. Step 3: Cross multiply
   225,678x = 490,722 × 490,722
4. Step 4: Simplify right side
   225,678x = 240,808,081,284
5. Step 5: Solve for x
   x = 240,808,081,284/225,678
6. Step 6: Final answer
   x = 1,067,042.78