Finding the Fourth Proportional to 1,123.80, 1,685.52 and 474.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.80 : 1,685.52 = 474.42 : x
2. Step 2: Convert to fraction form
   1,123.80/1,685.52 = 474.42/x
3. Step 3: Cross multiply
   1,123.80x = 1,685.52 × 474.42
4. Step 4: Simplify right side
   1,123.80x = 799,644.40
5. Step 5: Solve for x
   x = 799,644.40/1,123.80
6. Step 6: Final answer
   x = 711.55