Finding the Fourth Proportional to 10,936.81, 16,401.77 and 3,539.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,936.81 : 16,401.77 = 3,539.55 : x
2. Step 2: Convert to fraction form
   10,936.81/16,401.77 = 3,539.55/x
3. Step 3: Cross multiply
   10,936.81x = 16,401.77 × 3,539.55
4. Step 4: Simplify right side
   10,936.81x = 58,054,867.31
5. Step 5: Solve for x
   x = 58,054,867.31/10,936.81
6. Step 6: Final answer
   x = 5,308.21