Finding the Fourth Proportional to 2,571.09, 3,857.32 and 1,111.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.09 : 3,857.32 = 1,111.27 : x
2. Step 2: Convert to fraction form
   2,571.09/3,857.32 = 1,111.27/x
3. Step 3: Cross multiply
   2,571.09x = 3,857.32 × 1,111.27
4. Step 4: Simplify right side
   2,571.09x = 4,286,522.97
5. Step 5: Solve for x
   x = 4,286,522.97/2,571.09
6. Step 6: Final answer
   x = 1,667.20