Finding the Fourth Proportional to 2,728.72, 4,092.94 and 879.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.72 : 4,092.94 = 879.93 : x
2. Step 2: Convert to fraction form
   2,728.72/4,092.94 = 879.93/x
3. Step 3: Cross multiply
   2,728.72x = 4,092.94 × 879.93
4. Step 4: Simplify right side
   2,728.72x = 3,601,500.69
5. Step 5: Solve for x
   x = 3,601,500.69/2,728.72
6. Step 6: Final answer
   x = 1,319.85