Finding the Fourth Proportional to 1,367.97, 1,887.57 and 863.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.97 : 1,887.57 = 863.55 : x
2. Step 2: Convert to fraction form
   1,367.97/1,887.57 = 863.55/x
3. Step 3: Cross multiply
   1,367.97x = 1,887.57 × 863.55
4. Step 4: Simplify right side
   1,367.97x = 1,630,011.07
5. Step 5: Solve for x
   x = 1,630,011.07/1,367.97
6. Step 6: Final answer
   x = 1,191.55