Finding the Fourth Proportional to 10,815.12, 16,223.59 and 3,419.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,815.12 : 16,223.59 = 3,419.42 : x
2. Step 2: Convert to fraction form
   10,815.12/16,223.59 = 3,419.42/x
3. Step 3: Cross multiply
   10,815.12x = 16,223.59 × 3,419.42
4. Step 4: Simplify right side
   10,815.12x = 55,475,191.27
5. Step 5: Solve for x
   x = 55,475,191.27/10,815.12
6. Step 6: Final answer
   x = 5,129.41