Finding the Third Proportional to 57,120 and 123,960

Step by Step Solution

1. Step 1: Write the proportion equation
   57,120 : 123,960 = 123,960 : x
2. Step 2: Convert to fraction form
   57,120/123,960 = 123,960/x
3. Step 3: Cross multiply
   57,120x = 123,960 × 123,960
4. Step 4: Simplify right side
   57,120x = 15,366,081,600
5. Step 5: Solve for x
   x = 15,366,081,600/57,120
6. Step 6: Final answer
   x = 269,014.03