Finding the Fourth Proportional to 2,057.48, 2,838.93 and 1,271.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,057.48 : 2,838.93 = 1,271.78 : x
2. Step 2: Convert to fraction form
   2,057.48/2,838.93 = 1,271.78/x
3. Step 3: Cross multiply
   2,057.48x = 2,838.93 × 1,271.78
4. Step 4: Simplify right side
   2,057.48x = 3,610,494.40
5. Step 5: Solve for x
   x = 3,610,494.40/2,057.48
6. Step 6: Final answer
   x = 1,754.81