Finding the Fourth Proportional to 2,183.82, 3,013.41 and 1,239.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,183.82 : 3,013.41 = 1,239.72 : x
2. Step 2: Convert to fraction form
   2,183.82/3,013.41 = 1,239.72/x
3. Step 3: Cross multiply
   2,183.82x = 3,013.41 × 1,239.72
4. Step 4: Simplify right side
   2,183.82x = 3,735,784.65
5. Step 5: Solve for x
   x = 3,735,784.65/2,183.82
6. Step 6: Final answer
   x = 1,710.67