Finding the Fourth Proportional to 2,590.37, 3,883.38 and 1,128.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.37 : 3,883.38 = 1,128.42 : x
2. Step 2: Convert to fraction form
   2,590.37/3,883.38 = 1,128.42/x
3. Step 3: Cross multiply
   2,590.37x = 3,883.38 × 1,128.42
4. Step 4: Simplify right side
   2,590.37x = 4,382,079.43
5. Step 5: Solve for x
   x = 4,382,079.43/2,590.37
6. Step 6: Final answer
   x = 1,691.68