Finding the Fourth Proportional to 2,633.72, 3,949.25 and 878.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.72 : 3,949.25 = 878.11 : x
2. Step 2: Convert to fraction form
   2,633.72/3,949.25 = 878.11/x
3. Step 3: Cross multiply
   2,633.72x = 3,949.25 × 878.11
4. Step 4: Simplify right side
   2,633.72x = 3,467,861.65
5. Step 5: Solve for x
   x = 3,467,861.65/2,633.72
6. Step 6: Final answer
   x = 1,316.72