Finding the Fourth Proportional to 2,548.78, 3,518.39 and 1,554.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,548.78 : 3,518.39 = 1,554.41 : x
2. Step 2: Convert to fraction form
   2,548.78/3,518.39 = 1,554.41/x
3. Step 3: Cross multiply
   2,548.78x = 3,518.39 × 1,554.41
4. Step 4: Simplify right side
   2,548.78x = 5,469,033.28
5. Step 5: Solve for x
   x = 5,469,033.28/2,548.78
6. Step 6: Final answer
   x = 2,145.75