Finding the Fourth Proportional to 1,171.27, 1,758.12 and 863.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.27 : 1,758.12 = 863.47 : x
2. Step 2: Convert to fraction form
   1,171.27/1,758.12 = 863.47/x
3. Step 3: Cross multiply
   1,171.27x = 1,758.12 × 863.47
4. Step 4: Simplify right side
   1,171.27x = 1,518,083.88
5. Step 5: Solve for x
   x = 1,518,083.88/1,171.27
6. Step 6: Final answer
   x = 1,296.10