Finding the Fourth Proportional to 2,590.69, 3,883.84 and 1,128.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,590.69 : 3,883.84 = 1,128.73 : x
2. Step 2: Convert to fraction form
   2,590.69/3,883.84 = 1,128.73/x
3. Step 3: Cross multiply
   2,590.69x = 3,883.84 × 1,128.73
4. Step 4: Simplify right side
   2,590.69x = 4,383,806.72
5. Step 5: Solve for x
   x = 4,383,806.72/2,590.69
6. Step 6: Final answer
   x = 1,692.14