Finding the Fourth Proportional to 2,215.59, 3,057.72 and 1,331.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.59 : 3,057.72 = 1,331.37 : x
2. Step 2: Convert to fraction form
   2,215.59/3,057.72 = 1,331.37/x
3. Step 3: Cross multiply
   2,215.59x = 3,057.72 × 1,331.37
4. Step 4: Simplify right side
   2,215.59x = 4,070,956.68
5. Step 5: Solve for x
   x = 4,070,956.68/2,215.59
6. Step 6: Final answer
   x = 1,837.41