Finding the Fourth Proportional to 1,524.28, 2,103.60 and 860.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.28 : 2,103.60 = 860.89 : x
2. Step 2: Convert to fraction form
   1,524.28/2,103.60 = 860.89/x
3. Step 3: Cross multiply
   1,524.28x = 2,103.60 × 860.89
4. Step 4: Simplify right side
   1,524.28x = 1,810,968.20
5. Step 5: Solve for x
   x = 1,810,968.20/1,524.28
6. Step 6: Final answer
   x = 1,188.08