Finding the Fourth Proportional to 2,579.98, 3,880.56 and 2,355.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,579.98 : 3,880.56 = 2,355.81 : x
2. Step 2: Convert to fraction form
   2,579.98/3,880.56 = 2,355.81/x
3. Step 3: Cross multiply
   2,579.98x = 3,880.56 × 2,355.81
4. Step 4: Simplify right side
   2,579.98x = 9,141,854.00
5. Step 5: Solve for x
   x = 9,141,854.00/2,579.98
6. Step 6: Final answer
   x = 3,543.39