Finding the Fourth Proportional to 1,353.30, 1,866.40 and 1,003.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,353.30 : 1,866.40 = 1,003.38 : x
2. Step 2: Convert to fraction form
   1,353.30/1,866.40 = 1,003.38/x
3. Step 3: Cross multiply
   1,353.30x = 1,866.40 × 1,003.38
4. Step 4: Simplify right side
   1,353.30x = 1,872,708.43
5. Step 5: Solve for x
   x = 1,872,708.43/1,353.30
6. Step 6: Final answer
   x = 1,383.81