Finding the Fourth Proportional to 1,123.30, 1,684.68 and 603.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.30 : 1,684.68 = 603.10 : x
2. Step 2: Convert to fraction form
   1,123.30/1,684.68 = 603.10/x
3. Step 3: Cross multiply
   1,123.30x = 1,684.68 × 603.10
4. Step 4: Simplify right side
   1,123.30x = 1,016,030.51
5. Step 5: Solve for x
   x = 1,016,030.51/1,123.30
6. Step 6: Final answer
   x = 904.51