Finding the Fourth Proportional to 2,571.76, 3,855.36 and 1,111.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,571.76 : 3,855.36 = 1,111.12 : x
2. Step 2: Convert to fraction form
   2,571.76/3,855.36 = 1,111.12/x
3. Step 3: Cross multiply
   2,571.76x = 3,855.36 × 1,111.12
4. Step 4: Simplify right side
   2,571.76x = 4,283,767.60
5. Step 5: Solve for x
   x = 4,283,767.60/2,571.76
6. Step 6: Final answer
   x = 1,665.69