Finding the Fourth Proportional to 5,399.31, 8,100.33 and 2,280.10

Step by Step Solution

1. Step 1: Write the proportion equation
   5,399.31 : 8,100.33 = 2,280.10 : x
2. Step 2: Convert to fraction form
   5,399.31/8,100.33 = 2,280.10/x
3. Step 3: Cross multiply
   5,399.31x = 8,100.33 × 2,280.10
4. Step 4: Simplify right side
   5,399.31x = 18,469,555.23
5. Step 5: Solve for x
   x = 18,469,555.23/5,399.31
6. Step 6: Final answer
   x = 3,420.73