Finding the Fourth Proportional to 2,183.33, 3,012.31 and 1,239.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,183.33 : 3,012.31 = 1,239.05 : x
2. Step 2: Convert to fraction form
   2,183.33/3,012.31 = 1,239.05/x
3. Step 3: Cross multiply
   2,183.33x = 3,012.31 × 1,239.05
4. Step 4: Simplify right side
   2,183.33x = 3,732,402.71
5. Step 5: Solve for x
   x = 3,732,402.71/2,183.33
6. Step 6: Final answer
   x = 1,709.50