Finding the Fourth Proportional to 13,105.11, 19,648.39 and 4,217.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,105.11 : 19,648.39 = 4,217.69 : x
2. Step 2: Convert to fraction form
   13,105.11/19,648.39 = 4,217.69/x
3. Step 3: Cross multiply
   13,105.11x = 19,648.39 × 4,217.69
4. Step 4: Simplify right side
   13,105.11x = 82,870,698.69
5. Step 5: Solve for x
   x = 82,870,698.69/13,105.11
6. Step 6: Final answer
   x = 6,323.54