Finding the Fourth Proportional to 1,002.84, 1,383.92 and 560.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.84 : 1,383.92 = 560.79 : x
2. Step 2: Convert to fraction form
   1,002.84/1,383.92 = 560.79/x
3. Step 3: Cross multiply
   1,002.84x = 1,383.92 × 560.79
4. Step 4: Simplify right side
   1,002.84x = 776,085.69
5. Step 5: Solve for x
   x = 776,085.69/1,002.84
6. Step 6: Final answer
   x = 773.89