Finding the Fourth Proportional to 2,633.33, 3,950.70 and 878.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.33 : 3,950.70 = 878.61 : x
2. Step 2: Convert to fraction form
   2,633.33/3,950.70 = 878.61/x
3. Step 3: Cross multiply
   2,633.33x = 3,950.70 × 878.61
4. Step 4: Simplify right side
   2,633.33x = 3,471,124.53
5. Step 5: Solve for x
   x = 3,471,124.53/2,633.33
6. Step 6: Final answer
   x = 1,318.15