Finding the Fourth Proportional to 1,559.50, 2,152.14 and 860.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,559.50 : 2,152.14 = 860.86 : x
2. Step 2: Convert to fraction form
   1,559.50/2,152.14 = 860.86/x
3. Step 3: Cross multiply
   1,559.50x = 2,152.14 × 860.86
4. Step 4: Simplify right side
   1,559.50x = 1,852,691.24
5. Step 5: Solve for x
   x = 1,852,691.24/1,559.50
6. Step 6: Final answer
   x = 1,188.00