Finding the Fourth Proportional to 2,799.72, 3,863.55 and 1,540.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,799.72 : 3,863.55 = 1,540.80 : x
2. Step 2: Convert to fraction form
   2,799.72/3,863.55 = 1,540.80/x
3. Step 3: Cross multiply
   2,799.72x = 3,863.55 × 1,540.80
4. Step 4: Simplify right side
   2,799.72x = 5,952,957.84
5. Step 5: Solve for x
   x = 5,952,957.84/2,799.72
6. Step 6: Final answer
   x = 2,126.27