Finding the Fourth Proportional to 2,105.88, 3,159.54 and 1,800.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.88 : 3,159.54 = 1,800.60 : x
2. Step 2: Convert to fraction form
   2,105.88/3,159.54 = 1,800.60/x
3. Step 3: Cross multiply
   2,105.88x = 3,159.54 × 1,800.60
4. Step 4: Simplify right side
   2,105.88x = 5,689,067.72
5. Step 5: Solve for x
   x = 5,689,067.72/2,105.88
6. Step 6: Final answer
   x = 2,701.52