Finding the Fourth Proportional to 1,360.57, 1,878.38 and 863.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.57 : 1,878.38 = 863.63 : x
2. Step 2: Convert to fraction form
   1,360.57/1,878.38 = 863.63/x
3. Step 3: Cross multiply
   1,360.57x = 1,878.38 × 863.63
4. Step 4: Simplify right side
   1,360.57x = 1,622,225.32
5. Step 5: Solve for x
   x = 1,622,225.32/1,360.57
6. Step 6: Final answer
   x = 1,192.31