Finding the Fourth Proportional to 1,559.54, 2,152.24 and 860.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.54 : 2,152.24 = 860.96 : x
2. Step 2: Convert to fraction form
   1,559.54/2,152.24 = 860.96/x
3. Step 3: Cross multiply
   1,559.54x = 2,152.24 × 860.96
4. Step 4: Simplify right side
   1,559.54x = 1,852,992.55
5. Step 5: Solve for x
   x = 1,852,992.55/1,559.54
6. Step 6: Final answer
   x = 1,188.17