Finding the Fourth Proportional to 2,820.33, 4,231.43 and 1,359.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.33 : 4,231.43 = 1,359.31 : x
2. Step 2: Convert to fraction form
   2,820.33/4,231.43 = 1,359.31/x
3. Step 3: Cross multiply
   2,820.33x = 4,231.43 × 1,359.31
4. Step 4: Simplify right side
   2,820.33x = 5,751,825.11
5. Step 5: Solve for x
   x = 5,751,825.11/2,820.33
6. Step 6: Final answer
   x = 2,039.42