Finding the Fourth Proportional to 1,123.30, 1,683.92 and 574.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.30 : 1,683.92 = 574.28 : x
2. Step 2: Convert to fraction form
   1,123.30/1,683.92 = 574.28/x
3. Step 3: Cross multiply
   1,123.30x = 1,683.92 × 574.28
4. Step 4: Simplify right side
   1,123.30x = 967,030.29
5. Step 5: Solve for x
   x = 967,030.29/1,123.30
6. Step 6: Final answer
   x = 860.88