Finding the Fourth Proportional to 16,869.29, 23,279.90 and 10,911.33

Step by Step Solution

1. Step 1: Write the proportion equation
   16,869.29 : 23,279.90 = 10,911.33 : x
2. Step 2: Convert to fraction form
   16,869.29/23,279.90 = 10,911.33/x
3. Step 3: Cross multiply
   16,869.29x = 23,279.90 × 10,911.33
4. Step 4: Simplify right side
   16,869.29x = 254,014,616.71
5. Step 5: Solve for x
   x = 254,014,616.71/16,869.29
6. Step 6: Final answer
   x = 15,057.82