Finding the Fourth Proportional to 2,588.94, 3,885 and 1,128.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,588.94 : 3,885 = 1,128.18 : x
2. Step 2: Convert to fraction form
   2,588.94/3,885 = 1,128.18/x
3. Step 3: Cross multiply
   2,588.94x = 3,885 × 1,128.18
4. Step 4: Simplify right side
   2,588.94x = 4,382,979.30
5. Step 5: Solve for x
   x = 4,382,979.30/2,588.94
6. Step 6: Final answer
   x = 1,692.96