Finding the Fourth Proportional to 10,839.31, 16,257.27 and 3,442.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,839.31 : 16,257.27 = 3,442.80 : x
2. Step 2: Convert to fraction form
   10,839.31/16,257.27 = 3,442.80/x
3. Step 3: Cross multiply
   10,839.31x = 16,257.27 × 3,442.80
4. Step 4: Simplify right side
   10,839.31x = 55,970,447.87
5. Step 5: Solve for x
   x = 55,970,447.87/10,839.31
6. Step 6: Final answer
   x = 5,163.65