Finding the Fourth Proportional to 2,215.14, 3,057.34 and 1,271.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.14 : 3,057.34 = 1,271.57 : x
2. Step 2: Convert to fraction form
   2,215.14/3,057.34 = 1,271.57/x
3. Step 3: Cross multiply
   2,215.14x = 3,057.34 × 1,271.57
4. Step 4: Simplify right side
   2,215.14x = 3,887,616.50
5. Step 5: Solve for x
   x = 3,887,616.50/2,215.14
6. Step 6: Final answer
   x = 1,755.02