Finding the Fourth Proportional to 2,215.33, 3,057.16 and 1,331.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.33 : 3,057.16 = 1,331.15 : x
2. Step 2: Convert to fraction form
   2,215.33/3,057.16 = 1,331.15/x
3. Step 3: Cross multiply
   2,215.33x = 3,057.16 × 1,331.15
4. Step 4: Simplify right side
   2,215.33x = 4,069,519.92
5. Step 5: Solve for x
   x = 4,069,519.92/2,215.33
6. Step 6: Final answer
   x = 1,836.98