Finding the Fourth Proportional to 2,017.78, 2,783.24 and 1,271.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.78 : 2,783.24 = 1,271.10 : x
2. Step 2: Convert to fraction form
   2,017.78/2,783.24 = 1,271.10/x
3. Step 3: Cross multiply
   2,017.78x = 2,783.24 × 1,271.10
4. Step 4: Simplify right side
   2,017.78x = 3,537,776.36
5. Step 5: Solve for x
   x = 3,537,776.36/2,017.78
6. Step 6: Final answer
   x = 1,753.30