Finding the Fourth Proportional to 2,633.02, 3,949.62 and 878.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.02 : 3,949.62 = 878.18 : x
2. Step 2: Convert to fraction form
   2,633.02/3,949.62 = 878.18/x
3. Step 3: Cross multiply
   2,633.02x = 3,949.62 × 878.18
4. Step 4: Simplify right side
   2,633.02x = 3,468,477.29
5. Step 5: Solve for x
   x = 3,468,477.29/2,633.02
6. Step 6: Final answer
   x = 1,317.30