Finding the Fourth Proportional to 2,233.14, 3,081.56 and 1,288.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,233.14 : 3,081.56 = 1,288.91 : x
2. Step 2: Convert to fraction form
   2,233.14/3,081.56 = 1,288.91/x
3. Step 3: Cross multiply
   2,233.14x = 3,081.56 × 1,288.91
4. Step 4: Simplify right side
   2,233.14x = 3,971,831.65
5. Step 5: Solve for x
   x = 3,971,831.65/2,233.14
6. Step 6: Final answer
   x = 1,778.59