Finding the Fourth Proportional to 2,958.69, 4,436.49 and 878.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,958.69 : 4,436.49 = 878.41 : x
2. Step 2: Convert to fraction form
   2,958.69/4,436.49 = 878.41/x
3. Step 3: Cross multiply
   2,958.69x = 4,436.49 × 878.41
4. Step 4: Simplify right side
   2,958.69x = 3,897,046.09
5. Step 5: Solve for x
   x = 3,897,046.09/2,958.69
6. Step 6: Final answer
   x = 1,317.15