Finding the Fourth Proportional to 2,339.46, 3,228.42 and 1,291.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.46 : 3,228.42 = 1,291.50 : x
2. Step 2: Convert to fraction form
   2,339.46/3,228.42 = 1,291.50/x
3. Step 3: Cross multiply
   2,339.46x = 3,228.42 × 1,291.50
4. Step 4: Simplify right side
   2,339.46x = 4,169,504.43
5. Step 5: Solve for x
   x = 4,169,504.43/2,339.46
6. Step 6: Final answer
   x = 1,782.25