Finding the Fourth Proportional to 1,002.42, 1,383.39 and 560.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.42 : 1,383.39 = 560.28 : x
2. Step 2: Convert to fraction form
   1,002.42/1,383.39 = 560.28/x
3. Step 3: Cross multiply
   1,002.42x = 1,383.39 × 560.28
4. Step 4: Simplify right side
   1,002.42x = 775,085.75
5. Step 5: Solve for x
   x = 775,085.75/1,002.42
6. Step 6: Final answer
   x = 773.21