Finding the Third Proportional to 222,176 and 317,490

Step by Step Solution

1. Step 1: Write the proportion equation
   222,176 : 317,490 = 317,490 : x
2. Step 2: Convert to fraction form
   222,176/317,490 = 317,490/x
3. Step 3: Cross multiply
   222,176x = 317,490 × 317,490
4. Step 4: Simplify right side
   222,176x = 100,799,900,100
5. Step 5: Solve for x
   x = 100,799,900,100/222,176
6. Step 6: Final answer
   x = 453,693.92