Finding the Fourth Proportional to 1,361.76, 1,878.48 and 863.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.76 : 1,878.48 = 863.52 : x
2. Step 2: Convert to fraction form
   1,361.76/1,878.48 = 863.52/x
3. Step 3: Cross multiply
   1,361.76x = 1,878.48 × 863.52
4. Step 4: Simplify right side
   1,361.76x = 1,622,105.05
5. Step 5: Solve for x
   x = 1,622,105.05/1,361.76
6. Step 6: Final answer
   x = 1,191.18