Finding the Fourth Proportional to 2,591.45, 3,883.31 and 1,339.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591.45 : 3,883.31 = 1,339.21 : x
2. Step 2: Convert to fraction form
   2,591.45/3,883.31 = 1,339.21/x
3. Step 3: Cross multiply
   2,591.45x = 3,883.31 × 1,339.21
4. Step 4: Simplify right side
   2,591.45x = 5,200,567.59
5. Step 5: Solve for x
   x = 5,200,567.59/2,591.45
6. Step 6: Final answer
   x = 2,006.82