Finding the Fourth Proportional to 2,233.16, 3,081.54 and 1,288.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,233.16 : 3,081.54 = 1,288.78 : x
2. Step 2: Convert to fraction form
   2,233.16/3,081.54 = 1,288.78/x
3. Step 3: Cross multiply
   2,233.16x = 3,081.54 × 1,288.78
4. Step 4: Simplify right side
   2,233.16x = 3,971,427.12
5. Step 5: Solve for x
   x = 3,971,427.12/2,233.16
6. Step 6: Final answer
   x = 1,778.39