Finding the Fourth Proportional to 2,633.02, 3,949.63 and 878.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.02 : 3,949.63 = 878.15 : x
2. Step 2: Convert to fraction form
   2,633.02/3,949.63 = 878.15/x
3. Step 3: Cross multiply
   2,633.02x = 3,949.63 × 878.15
4. Step 4: Simplify right side
   2,633.02x = 3,468,367.58
5. Step 5: Solve for x
   x = 3,468,367.58/2,633.02
6. Step 6: Final answer
   x = 1,317.26