Finding the Fourth Proportional to 1,002.69, 1,383.27 and 609.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.69 : 1,383.27 = 609.03 : x
2. Step 2: Convert to fraction form
   1,002.69/1,383.27 = 609.03/x
3. Step 3: Cross multiply
   1,002.69x = 1,383.27 × 609.03
4. Step 4: Simplify right side
   1,002.69x = 842,452.93
5. Step 5: Solve for x
   x = 842,452.93/1,002.69
6. Step 6: Final answer
   x = 840.19