Finding the Fourth Proportional to 1,362.90, 1,879.98 and 865.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.90 : 1,879.98 = 865.17 : x
2. Step 2: Convert to fraction form
   1,362.90/1,879.98 = 865.17/x
3. Step 3: Cross multiply
   1,362.90x = 1,879.98 × 865.17
4. Step 4: Simplify right side
   1,362.90x = 1,626,502.30
5. Step 5: Solve for x
   x = 1,626,502.30/1,362.90
6. Step 6: Final answer
   x = 1,193.41