Finding the Fourth Proportional to 3,715.76, 5,127.72 and 2,143.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,715.76 : 5,127.72 = 2,143.82 : x
2. Step 2: Convert to fraction form
   3,715.76/5,127.72 = 2,143.82/x
3. Step 3: Cross multiply
   3,715.76x = 5,127.72 × 2,143.82
4. Step 4: Simplify right side
   3,715.76x = 10,992,908.69
5. Step 5: Solve for x
   x = 10,992,908.69/3,715.76
6. Step 6: Final answer
   x = 2,958.45