Finding the Fourth Proportional to 1,353.57, 1,866.29 and 1,143.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.57 : 1,866.29 = 1,143.38 : x
2. Step 2: Convert to fraction form
   1,353.57/1,866.29 = 1,143.38/x
3. Step 3: Cross multiply
   1,353.57x = 1,866.29 × 1,143.38
4. Step 4: Simplify right side
   1,353.57x = 2,133,863.61
5. Step 5: Solve for x
   x = 2,133,863.61/1,353.57
6. Step 6: Final answer
   x = 1,576.47