Finding the Third Proportional to 222,168 and 317,479

Step by Step Solution

1. Step 1: Write the proportion equation
   222,168 : 317,479 = 317,479 : x
2. Step 2: Convert to fraction form
   222,168/317,479 = 317,479/x
3. Step 3: Cross multiply
   222,168x = 317,479 × 317,479
4. Step 4: Simplify right side
   222,168x = 100,792,915,441
5. Step 5: Solve for x
   x = 100,792,915,441/222,168
6. Step 6: Final answer
   x = 453,678.82