Finding the Fourth Proportional to 3,081.56, 4,248.86 and 2,578.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,081.56 : 4,248.86 = 2,578.55 : x
2. Step 2: Convert to fraction form
   3,081.56/4,248.86 = 2,578.55/x
3. Step 3: Cross multiply
   3,081.56x = 4,248.86 × 2,578.55
4. Step 4: Simplify right side
   3,081.56x = 10,955,863.82
5. Step 5: Solve for x
   x = 10,955,863.82/3,081.56
6. Step 6: Final answer
   x = 3,555.30