Finding the Fourth Proportional to 2,183.10, 3,012.71 and 1,238.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,183.10 : 3,012.71 = 1,238.86 : x
2. Step 2: Convert to fraction form
   2,183.10/3,012.71 = 1,238.86/x
3. Step 3: Cross multiply
   2,183.10x = 3,012.71 × 1,238.86
4. Step 4: Simplify right side
   2,183.10x = 3,732,323.48
5. Step 5: Solve for x
   x = 3,732,323.48/2,183.10
6. Step 6: Final answer
   x = 1,709.65