Finding the Fourth Proportional to 1,123.50, 1,685.60 and 474.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.50 : 1,685.60 = 474.29 : x
2. Step 2: Convert to fraction form
   1,123.50/1,685.60 = 474.29/x
3. Step 3: Cross multiply
   1,123.50x = 1,685.60 × 474.29
4. Step 4: Simplify right side
   1,123.50x = 799,452.42
5. Step 5: Solve for x
   x = 799,452.42/1,123.50
6. Step 6: Final answer
   x = 711.57