Finding the Third Proportional to 222,918 and 487,308

Step by Step Solution

1. Step 1: Write the proportion equation
   222,918 : 487,308 = 487,308 : x
2. Step 2: Convert to fraction form
   222,918/487,308 = 487,308/x
3. Step 3: Cross multiply
   222,918x = 487,308 × 487,308
4. Step 4: Simplify right side
   222,918x = 237,469,086,864
5. Step 5: Solve for x
   x = 237,469,086,864/222,918
6. Step 6: Final answer
   x = 1,065,275.51