Finding the Fourth Proportional to 10,801.11, 16,204.50 and 3,405.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,801.11 : 16,204.50 = 3,405.81 : x
2. Step 2: Convert to fraction form
   10,801.11/16,204.50 = 3,405.81/x
3. Step 3: Cross multiply
   10,801.11x = 16,204.50 × 3,405.81
4. Step 4: Simplify right side
   10,801.11x = 55,189,448.15
5. Step 5: Solve for x
   x = 55,189,448.15/10,801.11
6. Step 6: Final answer
   x = 5,109.61