Finding the Fourth Proportional to 1,045.38, 1,442.58 and 603.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.38 : 1,442.58 = 603.30 : x
2. Step 2: Convert to fraction form
   1,045.38/1,442.58 = 603.30/x
3. Step 3: Cross multiply
   1,045.38x = 1,442.58 × 603.30
4. Step 4: Simplify right side
   1,045.38x = 870,308.51
5. Step 5: Solve for x
   x = 870,308.51/1,045.38
6. Step 6: Final answer
   x = 832.53