Finding the Fourth Proportional to 1,571.37, 2,168.52 and 863.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.37 : 2,168.52 = 863.29 : x
2. Step 2: Convert to fraction form
   1,571.37/2,168.52 = 863.29/x
3. Step 3: Cross multiply
   1,571.37x = 2,168.52 × 863.29
4. Step 4: Simplify right side
   1,571.37x = 1,872,051.79
5. Step 5: Solve for x
   x = 1,872,051.79/1,571.37
6. Step 6: Final answer
   x = 1,191.35