Finding the Third Proportional to 222,900 and 338,610

Step by Step Solution

1. Step 1: Write the proportion equation
   222,900 : 338,610 = 338,610 : x
2. Step 2: Convert to fraction form
   222,900/338,610 = 338,610/x
3. Step 3: Cross multiply
   222,900x = 338,610 × 338,610
4. Step 4: Simplify right side
   222,900x = 114,656,732,100
5. Step 5: Solve for x
   x = 114,656,732,100/222,900
6. Step 6: Final answer
   x = 514,386.42