Finding the Fourth Proportional to 2,215.30, 3,057.32 and 1,271.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.30 : 3,057.32 = 1,271.42 : x
2. Step 2: Convert to fraction form
   2,215.30/3,057.32 = 1,271.42/x
3. Step 3: Cross multiply
   2,215.30x = 3,057.32 × 1,271.42
4. Step 4: Simplify right side
   2,215.30x = 3,887,137.79
5. Step 5: Solve for x
   x = 3,887,137.79/2,215.30
6. Step 6: Final answer
   x = 1,754.68