Finding the Fourth Proportional to 2,233.76, 3,082.57 and 1,239.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,233.76 : 3,082.57 = 1,239.05 : x
2. Step 2: Convert to fraction form
   2,233.76/3,082.57 = 1,239.05/x
3. Step 3: Cross multiply
   2,233.76x = 3,082.57 × 1,239.05
4. Step 4: Simplify right side
   2,233.76x = 3,819,461.27
5. Step 5: Solve for x
   x = 3,819,461.27/2,233.76
6. Step 6: Final answer
   x = 1,709.88