Finding the Fourth Proportional to 2,880.70, 3,978.32 and 2,481.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,880.70 : 3,978.32 = 2,481.57 : x
2. Step 2: Convert to fraction form
   2,880.70/3,978.32 = 2,481.57/x
3. Step 3: Cross multiply
   2,880.70x = 3,978.32 × 2,481.57
4. Step 4: Simplify right side
   2,880.70x = 9,872,467.15
5. Step 5: Solve for x
   x = 9,872,467.15/2,880.70
6. Step 6: Final answer
   x = 3,427.11