Finding the Fourth Proportional to 2,550.78, 3,521.15 and 1,556.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.78 : 3,521.15 = 1,556.41 : x
2. Step 2: Convert to fraction form
   2,550.78/3,521.15 = 1,556.41/x
3. Step 3: Cross multiply
   2,550.78x = 3,521.15 × 1,556.41
4. Step 4: Simplify right side
   2,550.78x = 5,480,353.07
5. Step 5: Solve for x
   x = 5,480,353.07/2,550.78
6. Step 6: Final answer
   x = 2,148.50