Finding the Fourth Proportional to 1,367.56, 2,049.61 and 873.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.56 : 2,049.61 = 873.78 : x
2. Step 2: Convert to fraction form
   1,367.56/2,049.61 = 873.78/x
3. Step 3: Cross multiply
   1,367.56x = 2,049.61 × 873.78
4. Step 4: Simplify right side
   1,367.56x = 1,790,908.23
5. Step 5: Solve for x
   x = 1,790,908.23/1,367.56
6. Step 6: Final answer
   x = 1,309.56