Finding the Fourth Proportional to 1,112.52, 1,535.86 and 863.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,112.52 : 1,535.86 = 863.28 : x
2. Step 2: Convert to fraction form
   1,112.52/1,535.86 = 863.28/x
3. Step 3: Cross multiply
   1,112.52x = 1,535.86 × 863.28
4. Step 4: Simplify right side
   1,112.52x = 1,325,877.22
5. Step 5: Solve for x
   x = 1,325,877.22/1,112.52
6. Step 6: Final answer
   x = 1,191.78