Finding the Fourth Proportional to 10,836.89, 16,257.38 and 3,443.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,836.89 : 16,257.38 = 3,443.21 : x
2. Step 2: Convert to fraction form
   10,836.89/16,257.38 = 3,443.21/x
3. Step 3: Cross multiply
   10,836.89x = 16,257.38 × 3,443.21
4. Step 4: Simplify right side
   10,836.89x = 55,977,474.89
5. Step 5: Solve for x
   x = 55,977,474.89/10,836.89
6. Step 6: Final answer
   x = 5,165.46