Finding the Third Proportional to 57,980 and 126,040

Step by Step Solution

1. Step 1: Write the proportion equation
   57,980 : 126,040 = 126,040 : x
2. Step 2: Convert to fraction form
   57,980/126,040 = 126,040/x
3. Step 3: Cross multiply
   57,980x = 126,040 × 126,040
4. Step 4: Simplify right side
   57,980x = 15,886,081,600
5. Step 5: Solve for x
   x = 15,886,081,600/57,980
6. Step 6: Final answer
   x = 273,992.44