Finding the Fourth Proportional to 1,123.48, 1,686.25 and 568.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.48 : 1,686.25 = 568.58 : x
2. Step 2: Convert to fraction form
   1,123.48/1,686.25 = 568.58/x
3. Step 3: Cross multiply
   1,123.48x = 1,686.25 × 568.58
4. Step 4: Simplify right side
   1,123.48x = 958,760.30
5. Step 5: Solve for x
   x = 958,760.30/1,123.48
6. Step 6: Final answer
   x = 853.39