Finding the Fourth Proportional to 2,339.31, 3,228.03 and 1,291.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.31 : 3,228.03 = 1,291.37 : x
2. Step 2: Convert to fraction form
   2,339.31/3,228.03 = 1,291.37/x
3. Step 3: Cross multiply
   2,339.31x = 3,228.03 × 1,291.37
4. Step 4: Simplify right side
   2,339.31x = 4,168,564.96
5. Step 5: Solve for x
   x = 4,168,564.96/2,339.31
6. Step 6: Final answer
   x = 1,781.96