Finding the Fourth Proportional to 2,727.42, 4,091.54 and 878.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,727.42 : 4,091.54 = 878.06 : x
2. Step 2: Convert to fraction form
   2,727.42/4,091.54 = 878.06/x
3. Step 3: Cross multiply
   2,727.42x = 4,091.54 × 878.06
4. Step 4: Simplify right side
   2,727.42x = 3,592,592.76
5. Step 5: Solve for x
   x = 3,592,592.76/2,727.42
6. Step 6: Final answer
   x = 1,317.21