Finding the Fourth Proportional to 1,162.03, 1,603.52 and 638.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.03 : 1,603.52 = 638.05 : x
2. Step 2: Convert to fraction form
   1,162.03/1,603.52 = 638.05/x
3. Step 3: Cross multiply
   1,162.03x = 1,603.52 × 638.05
4. Step 4: Simplify right side
   1,162.03x = 1,023,125.94
5. Step 5: Solve for x
   x = 1,023,125.94/1,162.03
6. Step 6: Final answer
   x = 880.46