Finding the Fourth Proportional to 2,215.56, 3,057.49 and 1,331.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.56 : 3,057.49 = 1,331.38 : x
2. Step 2: Convert to fraction form
   2,215.56/3,057.49 = 1,331.38/x
3. Step 3: Cross multiply
   2,215.56x = 3,057.49 × 1,331.38
4. Step 4: Simplify right side
   2,215.56x = 4,070,681.04
5. Step 5: Solve for x
   x = 4,070,681.04/2,215.56
6. Step 6: Final answer
   x = 1,837.31