Finding the Third Proportional to 225,978 and 490,836

Step by Step Solution

1. Step 1: Write the proportion equation
   225,978 : 490,836 = 490,836 : x
2. Step 2: Convert to fraction form
   225,978/490,836 = 490,836/x
3. Step 3: Cross multiply
   225,978x = 490,836 × 490,836
4. Step 4: Simplify right side
   225,978x = 240,919,978,896
5. Step 5: Solve for x
   x = 240,919,978,896/225,978
6. Step 6: Final answer
   x = 1,066,121.39