Finding the Fourth Proportional to 1,361.49, 1,878.44 and 863.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.49 : 1,878.44 = 863.96 : x
2. Step 2: Convert to fraction form
   1,361.49/1,878.44 = 863.96/x
3. Step 3: Cross multiply
   1,361.49x = 1,878.44 × 863.96
4. Step 4: Simplify right side
   1,361.49x = 1,622,883.31
5. Step 5: Solve for x
   x = 1,622,883.31/1,361.49
6. Step 6: Final answer
   x = 1,191.99