Finding the Fourth Proportional to 1,123.34, 1,683.31 and 574.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.34 : 1,683.31 = 574.77 : x
2. Step 2: Convert to fraction form
   1,123.34/1,683.31 = 574.77/x
3. Step 3: Cross multiply
   1,123.34x = 1,683.31 × 574.77
4. Step 4: Simplify right side
   1,123.34x = 967,515.69
5. Step 5: Solve for x
   x = 967,515.69/1,123.34
6. Step 6: Final answer
   x = 861.28