Finding the Third Proportional to 57,618 and 123,220

Step by Step Solution

1. Step 1: Write the proportion equation
   57,618 : 123,220 = 123,220 : x
2. Step 2: Convert to fraction form
   57,618/123,220 = 123,220/x
3. Step 3: Cross multiply
   57,618x = 123,220 × 123,220
4. Step 4: Simplify right side
   57,618x = 15,183,168,400
5. Step 5: Solve for x
   x = 15,183,168,400/57,618
6. Step 6: Final answer
   x = 263,514.33