Finding the Fourth Proportional to 3,715.89, 5,128.16 and 2,144.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,715.89 : 5,128.16 = 2,144.09 : x
2. Step 2: Convert to fraction form
   3,715.89/5,128.16 = 2,144.09/x
3. Step 3: Cross multiply
   3,715.89x = 5,128.16 × 2,144.09
4. Step 4: Simplify right side
   3,715.89x = 10,995,200.21
5. Step 5: Solve for x
   x = 10,995,200.21/3,715.89
6. Step 6: Final answer
   x = 2,958.97