Finding the Fourth Proportional to 2,728.55, 4,092.01 and 1,429.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.55 : 4,092.01 = 1,429.31 : x
2. Step 2: Convert to fraction form
   2,728.55/4,092.01 = 1,429.31/x
3. Step 3: Cross multiply
   2,728.55x = 4,092.01 × 1,429.31
4. Step 4: Simplify right side
   2,728.55x = 5,848,750.81
5. Step 5: Solve for x
   x = 5,848,750.81/2,728.55
6. Step 6: Final answer
   x = 2,143.54