Finding the Fourth Proportional to 1,123.40, 1,683.30 and 574.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.40 : 1,683.30 = 574.76 : x
2. Step 2: Convert to fraction form
   1,123.40/1,683.30 = 574.76/x
3. Step 3: Cross multiply
   1,123.40x = 1,683.30 × 574.76
4. Step 4: Simplify right side
   1,123.40x = 967,493.51
5. Step 5: Solve for x
   x = 967,493.51/1,123.40
6. Step 6: Final answer
   x = 861.22