Finding the Fourth Proportional to 2,722.56, 4,084.72 and 873.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722.56 : 4,084.72 = 873.60 : x
2. Step 2: Convert to fraction form
   2,722.56/4,084.72 = 873.60/x
3. Step 3: Cross multiply
   2,722.56x = 4,084.72 × 873.60
4. Step 4: Simplify right side
   2,722.56x = 3,568,411.39
5. Step 5: Solve for x
   x = 3,568,411.39/2,722.56
6. Step 6: Final answer
   x = 1,310.68