Finding the Fourth Proportional to 2,727.42, 4,090.86 and 878.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,727.42 : 4,090.86 = 878.19 : x
2. Step 2: Convert to fraction form
   2,727.42/4,090.86 = 878.19/x
3. Step 3: Cross multiply
   2,727.42x = 4,090.86 × 878.19
4. Step 4: Simplify right side
   2,727.42x = 3,592,552.34
5. Step 5: Solve for x
   x = 3,592,552.34/2,727.42
6. Step 6: Final answer
   x = 1,317.20