Finding the Fourth Proportional to 1,383.17, 2,069.28 and 1,103.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,383.17 : 2,069.28 = 1,103.31 : x
2. Step 2: Convert to fraction form
   1,383.17/2,069.28 = 1,103.31/x
3. Step 3: Cross multiply
   1,383.17x = 2,069.28 × 1,103.31
4. Step 4: Simplify right side
   1,383.17x = 2,283,057.32
5. Step 5: Solve for x
   x = 2,283,057.32/1,383.17
6. Step 6: Final answer
   x = 1,650.60