Finding the Fourth Proportional to 2,589.30, 3,880.71 and 2,039.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589.30 : 3,880.71 = 2,039.31 : x
2. Step 2: Convert to fraction form
   2,589.30/3,880.71 = 2,039.31/x
3. Step 3: Cross multiply
   2,589.30x = 3,880.71 × 2,039.31
4. Step 4: Simplify right side
   2,589.30x = 7,913,970.71
5. Step 5: Solve for x
   x = 7,913,970.71/2,589.30
6. Step 6: Final answer
   x = 3,056.41