Finding the Fourth Proportional to 2,740.80, 4,111.28 and 1,180.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.80 : 4,111.28 = 1,180.72 : x
2. Step 2: Convert to fraction form
   2,740.80/4,111.28 = 1,180.72/x
3. Step 3: Cross multiply
   2,740.80x = 4,111.28 × 1,180.72
4. Step 4: Simplify right side
   2,740.80x = 4,854,270.52
5. Step 5: Solve for x
   x = 4,854,270.52/2,740.80
6. Step 6: Final answer
   x = 1,771.11