Finding the Fourth Proportional to 1,360.31, 1,878.37 and 863.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.31 : 1,878.37 = 863.83 : x
2. Step 2: Convert to fraction form
   1,360.31/1,878.37 = 863.83/x
3. Step 3: Cross multiply
   1,360.31x = 1,878.37 × 863.83
4. Step 4: Simplify right side
   1,360.31x = 1,622,592.36
5. Step 5: Solve for x
   x = 1,622,592.36/1,360.31
6. Step 6: Final answer
   x = 1,192.81