Finding the Fourth Proportional to 1,171.15, 1,757.58 and 863.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.15 : 1,757.58 = 863.83 : x
2. Step 2: Convert to fraction form
   1,171.15/1,757.58 = 863.83/x
3. Step 3: Cross multiply
   1,171.15x = 1,757.58 × 863.83
4. Step 4: Simplify right side
   1,171.15x = 1,518,254.15
5. Step 5: Solve for x
   x = 1,518,254.15/1,171.15
6. Step 6: Final answer
   x = 1,296.38