Finding the Fourth Proportional to 1,162.02, 1,603.58 and 638.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.02 : 1,603.58 = 638.04 : x
2. Step 2: Convert to fraction form
   1,162.02/1,603.58 = 638.04/x
3. Step 3: Cross multiply
   1,162.02x = 1,603.58 × 638.04
4. Step 4: Simplify right side
   1,162.02x = 1,023,141.76
5. Step 5: Solve for x
   x = 1,023,141.76/1,162.02
6. Step 6: Final answer
   x = 880.49