Finding the Fourth Proportional to 2,550.18, 3,519.81 and 1,555.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,550.18 : 3,519.81 = 1,555.50 : x
2. Step 2: Convert to fraction form
   2,550.18/3,519.81 = 1,555.50/x
3. Step 3: Cross multiply
   2,550.18x = 3,519.81 × 1,555.50
4. Step 4: Simplify right side
   2,550.18x = 5,475,064.46
5. Step 5: Solve for x
   x = 5,475,064.46/2,550.18
6. Step 6: Final answer
   x = 2,146.93