Finding the Fourth Proportional to 3,715.42, 5,127.09 and 2,143.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,715.42 : 5,127.09 = 2,143.42 : x
2. Step 2: Convert to fraction form
   3,715.42/5,127.09 = 2,143.42/x
3. Step 3: Cross multiply
   3,715.42x = 5,127.09 × 2,143.42
4. Step 4: Simplify right side
   3,715.42x = 10,989,507.25
5. Step 5: Solve for x
   x = 10,989,507.25/3,715.42
6. Step 6: Final answer
   x = 2,957.81