Finding the Fourth Proportional to 2,880.56, 3,976.98 and 2,285.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,880.56 : 3,976.98 = 2,285.48 : x
2. Step 2: Convert to fraction form
   2,880.56/3,976.98 = 2,285.48/x
3. Step 3: Cross multiply
   2,880.56x = 3,976.98 × 2,285.48
4. Step 4: Simplify right side
   2,880.56x = 9,089,308.25
5. Step 5: Solve for x
   x = 9,089,308.25/2,880.56
6. Step 6: Final answer
   x = 3,155.40