Finding the Fourth Proportional to 2,215.47, 3,057.82 and 1,271.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.47 : 3,057.82 = 1,271.42 : x
2. Step 2: Convert to fraction form
   2,215.47/3,057.82 = 1,271.42/x
3. Step 3: Cross multiply
   2,215.47x = 3,057.82 × 1,271.42
4. Step 4: Simplify right side
   2,215.47x = 3,887,755.04
5. Step 5: Solve for x
   x = 3,887,755.04/2,215.47
6. Step 6: Final answer
   x = 1,754.82