Finding the Fourth Proportional to 2,727.49, 4,091.57 and 878.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,727.49 : 4,091.57 = 878.10 : x
2. Step 2: Convert to fraction form
   2,727.49/4,091.57 = 878.10/x
3. Step 3: Cross multiply
   2,727.49x = 4,091.57 × 878.10
4. Step 4: Simplify right side
   2,727.49x = 3,592,807.62
5. Step 5: Solve for x
   x = 3,592,807.62/2,727.49
6. Step 6: Final answer
   x = 1,317.26