Finding the Fourth Proportional to 1,003.24, 1,382.88 and 803.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.24 : 1,382.88 = 803.42 : x
2. Step 2: Convert to fraction form
   1,003.24/1,382.88 = 803.42/x
3. Step 3: Cross multiply
   1,003.24x = 1,382.88 × 803.42
4. Step 4: Simplify right side
   1,003.24x = 1,111,033.45
5. Step 5: Solve for x
   x = 1,111,033.45/1,003.24
6. Step 6: Final answer
   x = 1,107.45