Finding the Third Proportional to 222,028 and 329,610

Step by Step Solution

1. Step 1: Write the proportion equation
   222,028 : 329,610 = 329,610 : x
2. Step 2: Convert to fraction form
   222,028/329,610 = 329,610/x
3. Step 3: Cross multiply
   222,028x = 329,610 × 329,610
4. Step 4: Simplify right side
   222,028x = 108,642,752,100
5. Step 5: Solve for x
   x = 108,642,752,100/222,028
6. Step 6: Final answer
   x = 489,320.05