Finding the Fourth Proportional to 2,674.57, 4,013.52 and 1,288.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,674.57 : 4,013.52 = 1,288.05 : x
2. Step 2: Convert to fraction form
   2,674.57/4,013.52 = 1,288.05/x
3. Step 3: Cross multiply
   2,674.57x = 4,013.52 × 1,288.05
4. Step 4: Simplify right side
   2,674.57x = 5,169,587.93
5. Step 5: Solve for x
   x = 5,169,587.93/2,674.57
6. Step 6: Final answer
   x = 1,932.87