Finding the Fourth Proportional to 1,123.59, 1,684.38 and 603.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.59 : 1,684.38 = 603.30 : x
2. Step 2: Convert to fraction form
   1,123.59/1,684.38 = 603.30/x
3. Step 3: Cross multiply
   1,123.59x = 1,684.38 × 603.30
4. Step 4: Simplify right side
   1,123.59x = 1,016,186.45
5. Step 5: Solve for x
   x = 1,016,186.45/1,123.59
6. Step 6: Final answer
   x = 904.41