Finding the Fourth Proportional to 3,715.24, 5,127.16 and 2,143.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,715.24 : 5,127.16 = 2,143.30 : x
2. Step 2: Convert to fraction form
   3,715.24/5,127.16 = 2,143.30/x
3. Step 3: Cross multiply
   3,715.24x = 5,127.16 × 2,143.30
4. Step 4: Simplify right side
   3,715.24x = 10,989,042.03
5. Step 5: Solve for x
   x = 10,989,042.03/3,715.24
6. Step 6: Final answer
   x = 2,957.83