Finding the Fourth Proportional to 4,140.89, 5,711.31 and 2,812.29

Step by Step Solution

1. Step 1: Write the proportion equation
   4,140.89 : 5,711.31 = 2,812.29 : x
2. Step 2: Convert to fraction form
   4,140.89/5,711.31 = 2,812.29/x
3. Step 3: Cross multiply
   4,140.89x = 5,711.31 × 2,812.29
4. Step 4: Simplify right side
   4,140.89x = 16,061,838.58
5. Step 5: Solve for x
   x = 16,061,838.58/4,140.89
6. Step 6: Final answer
   x = 3,878.84