Finding the Fourth Proportional to 1,123.09, 1,683.87 and 574.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.09 : 1,683.87 = 574.83 : x
2. Step 2: Convert to fraction form
   1,123.09/1,683.87 = 574.83/x
3. Step 3: Cross multiply
   1,123.09x = 1,683.87 × 574.83
4. Step 4: Simplify right side
   1,123.09x = 967,930.57
5. Step 5: Solve for x
   x = 967,930.57/1,123.09
6. Step 6: Final answer
   x = 861.85