Finding the Fourth Proportional to 1,524.56, 2,104.04 and 861.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,524.56 : 2,104.04 = 861.60 : x
2. Step 2: Convert to fraction form
   1,524.56/2,104.04 = 861.60/x
3. Step 3: Cross multiply
   1,524.56x = 2,104.04 × 861.60
4. Step 4: Simplify right side
   1,524.56x = 1,812,840.86
5. Step 5: Solve for x
   x = 1,812,840.86/1,524.56
6. Step 6: Final answer
   x = 1,189.09