Finding the Fourth Proportional to 2,018.10, 2,785.40 and 1,271.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.10 : 2,785.40 = 1,271.55 : x
2. Step 2: Convert to fraction form
   2,018.10/2,785.40 = 1,271.55/x
3. Step 3: Cross multiply
   2,018.10x = 2,785.40 × 1,271.55
4. Step 4: Simplify right side
   2,018.10x = 3,541,775.37
5. Step 5: Solve for x
   x = 3,541,775.37/2,018.10
6. Step 6: Final answer
   x = 1,755.00