Finding the Fourth Proportional to 2,215.51, 3,057.55 and 1,331.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.51 : 3,057.55 = 1,331.33 : x
2. Step 2: Convert to fraction form
   2,215.51/3,057.55 = 1,331.33/x
3. Step 3: Cross multiply
   2,215.51x = 3,057.55 × 1,331.33
4. Step 4: Simplify right side
   2,215.51x = 4,070,589.43
5. Step 5: Solve for x
   x = 4,070,589.43/2,215.51
6. Step 6: Final answer
   x = 1,837.32