Finding the Third Proportional to 56,080 and 123,540

Step by Step Solution

1. Step 1: Write the proportion equation
   56,080 : 123,540 = 123,540 : x
2. Step 2: Convert to fraction form
   56,080/123,540 = 123,540/x
3. Step 3: Cross multiply
   56,080x = 123,540 × 123,540
4. Step 4: Simplify right side
   56,080x = 15,262,131,600
5. Step 5: Solve for x
   x = 15,262,131,600/56,080
6. Step 6: Final answer
   x = 272,149.28