Finding the Fourth Proportional to 1,162.32, 1,604.04 and 638.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.32 : 1,604.04 = 638.38 : x
2. Step 2: Convert to fraction form
   1,162.32/1,604.04 = 638.38/x
3. Step 3: Cross multiply
   1,162.32x = 1,604.04 × 638.38
4. Step 4: Simplify right side
   1,162.32x = 1,023,987.06
5. Step 5: Solve for x
   x = 1,023,987.06/1,162.32
6. Step 6: Final answer
   x = 880.99