Finding the Fourth Proportional to 2,826.56, 4,240.32 and 878.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,826.56 : 4,240.32 = 878.38 : x
2. Step 2: Convert to fraction form
   2,826.56/4,240.32 = 878.38/x
3. Step 3: Cross multiply
   2,826.56x = 4,240.32 × 878.38
4. Step 4: Simplify right side
   2,826.56x = 3,724,598.39
5. Step 5: Solve for x
   x = 3,724,598.39/2,826.56
6. Step 6: Final answer
   x = 1,317.71