Finding the Fourth Proportional to 2,183.31, 3,013.50 and 1,386.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,183.31 : 3,013.50 = 1,386.39 : x
2. Step 2: Convert to fraction form
   2,183.31/3,013.50 = 1,386.39/x
3. Step 3: Cross multiply
   2,183.31x = 3,013.50 × 1,386.39
4. Step 4: Simplify right side
   2,183.31x = 4,177,886.27
5. Step 5: Solve for x
   x = 4,177,886.27/2,183.31
6. Step 6: Final answer
   x = 1,913.56