Finding the Fourth Proportional to 1,162.38, 1,604.28 and 865.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.38 : 1,604.28 = 865.61 : x
2. Step 2: Convert to fraction form
   1,162.38/1,604.28 = 865.61/x
3. Step 3: Cross multiply
   1,162.38x = 1,604.28 × 865.61
4. Step 4: Simplify right side
   1,162.38x = 1,388,678.81
5. Step 5: Solve for x
   x = 1,388,678.81/1,162.38
6. Step 6: Final answer
   x = 1,194.68