Finding the Fourth Proportional to 2,233.58, 3,082.55 and 1,289.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,233.58 : 3,082.55 = 1,289.40 : x
2. Step 2: Convert to fraction form
   2,233.58/3,082.55 = 1,289.40/x
3. Step 3: Cross multiply
   2,233.58x = 3,082.55 × 1,289.40
4. Step 4: Simplify right side
   2,233.58x = 3,974,639.97
5. Step 5: Solve for x
   x = 3,974,639.97/2,233.58
6. Step 6: Final answer
   x = 1,779.49