Finding the Third Proportional to 222,968 and 490,216

Step by Step Solution

1. Step 1: Write the proportion equation
   222,968 : 490,216 = 490,216 : x
2. Step 2: Convert to fraction form
   222,968/490,216 = 490,216/x
3. Step 3: Cross multiply
   222,968x = 490,216 × 490,216
4. Step 4: Simplify right side
   222,968x = 240,311,726,656
5. Step 5: Solve for x
   x = 240,311,726,656/222,968
6. Step 6: Final answer
   x = 1,077,785.72