Finding the Fourth Proportional to 2,727.34, 4,090.60 and 878.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,727.34 : 4,090.60 = 878.61 : x
2. Step 2: Convert to fraction form
   2,727.34/4,090.60 = 878.61/x
3. Step 3: Cross multiply
   2,727.34x = 4,090.60 × 878.61
4. Step 4: Simplify right side
   2,727.34x = 3,594,058.50
5. Step 5: Solve for x
   x = 3,594,058.50/2,727.34
6. Step 6: Final answer
   x = 1,317.79