Finding the Fourth Proportional to 2,183.32, 3,012.87 and 1,188.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,183.32 : 3,012.87 = 1,188.59 : x
2. Step 2: Convert to fraction form
   2,183.32/3,012.87 = 1,188.59/x
3. Step 3: Cross multiply
   2,183.32x = 3,012.87 × 1,188.59
4. Step 4: Simplify right side
   2,183.32x = 3,581,067.15
5. Step 5: Solve for x
   x = 3,581,067.15/2,183.32
6. Step 6: Final answer
   x = 1,640.20