Finding the Fourth Proportional to 1,123.55, 1,684.29 and 574.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.55 : 1,684.29 = 574.53 : x
2. Step 2: Convert to fraction form
   1,123.55/1,684.29 = 574.53/x
3. Step 3: Cross multiply
   1,123.55x = 1,684.29 × 574.53
4. Step 4: Simplify right side
   1,123.55x = 967,666.71
5. Step 5: Solve for x
   x = 967,666.71/1,123.55
6. Step 6: Final answer
   x = 861.26