Finding the Fourth Proportional to 2,578.50, 3,558.35 and 1,531.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578.50 : 3,558.35 = 1,531.46 : x
2. Step 2: Convert to fraction form
   2,578.50/3,558.35 = 1,531.46/x
3. Step 3: Cross multiply
   2,578.50x = 3,558.35 × 1,531.46
4. Step 4: Simplify right side
   2,578.50x = 5,449,470.69
5. Step 5: Solve for x
   x = 5,449,470.69/2,578.50
6. Step 6: Final answer
   x = 2,113.43