Finding the Fourth Proportional to 1,123.55, 1,684.32 and 603.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.55 : 1,684.32 = 603.83 : x
2. Step 2: Convert to fraction form
   1,123.55/1,684.32 = 603.83/x
3. Step 3: Cross multiply
   1,123.55x = 1,684.32 × 603.83
4. Step 4: Simplify right side
   1,123.55x = 1,017,034.52
5. Step 5: Solve for x
   x = 1,017,034.52/1,123.55
6. Step 6: Final answer
   x = 905.20