Finding the Fourth Proportional to 2,128.79, 3,193.33 and 568.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.79 : 3,193.33 = 568.78 : x
2. Step 2: Convert to fraction form
   2,128.79/3,193.33 = 568.78/x
3. Step 3: Cross multiply
   2,128.79x = 3,193.33 × 568.78
4. Step 4: Simplify right side
   2,128.79x = 1,816,286.27
5. Step 5: Solve for x
   x = 1,816,286.27/2,128.79
6. Step 6: Final answer
   x = 853.20