Finding the Fourth Proportional to 2,339.63, 3,228.71 and 1,291.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,339.63 : 3,228.71 = 1,291.76 : x
2. Step 2: Convert to fraction form
   2,339.63/3,228.71 = 1,291.76/x
3. Step 3: Cross multiply
   2,339.63x = 3,228.71 × 1,291.76
4. Step 4: Simplify right side
   2,339.63x = 4,170,695.83
5. Step 5: Solve for x
   x = 4,170,695.83/2,339.63
6. Step 6: Final answer
   x = 1,782.63