Finding the Fourth Proportional to 2,215.87, 3,057.89 and 1,331.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.87 : 3,057.89 = 1,331.68 : x
2. Step 2: Convert to fraction form
   2,215.87/3,057.89 = 1,331.68/x
3. Step 3: Cross multiply
   2,215.87x = 3,057.89 × 1,331.68
4. Step 4: Simplify right side
   2,215.87x = 4,072,130.96
5. Step 5: Solve for x
   x = 4,072,130.96/2,215.87
6. Step 6: Final answer
   x = 1,837.71