Finding the Fourth Proportional to 2,558.84, 3,531.33 and 1,439.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,558.84 : 3,531.33 = 1,439.82 : x
2. Step 2: Convert to fraction form
   2,558.84/3,531.33 = 1,439.82/x
3. Step 3: Cross multiply
   2,558.84x = 3,531.33 × 1,439.82
4. Step 4: Simplify right side
   2,558.84x = 5,084,479.56
5. Step 5: Solve for x
   x = 5,084,479.56/2,558.84
6. Step 6: Final answer
   x = 1,987.03