Finding the Fourth Proportional to 1,369.69, 1,889.49 and 865.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.69 : 1,889.49 = 865.32 : x
2. Step 2: Convert to fraction form
   1,369.69/1,889.49 = 865.32/x
3. Step 3: Cross multiply
   1,369.69x = 1,889.49 × 865.32
4. Step 4: Simplify right side
   1,369.69x = 1,635,013.49
5. Step 5: Solve for x
   x = 1,635,013.49/1,369.69
6. Step 6: Final answer
   x = 1,193.71