Finding the Fourth Proportional to 3,892.57, 5,371.76 and 2,124.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.57 : 5,371.76 = 2,124.18 : x
2. Step 2: Convert to fraction form
   3,892.57/5,371.76 = 2,124.18/x
3. Step 3: Cross multiply
   3,892.57x = 5,371.76 × 2,124.18
4. Step 4: Simplify right side
   3,892.57x = 11,410,574.54
5. Step 5: Solve for x
   x = 11,410,574.54/3,892.57
6. Step 6: Final answer
   x = 2,931.37