Finding the Fourth Proportional to 12,411.10, 17,121.61 and 10,996.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,411.10 : 17,121.61 = 10,996.23 : x
2. Step 2: Convert to fraction form
   12,411.10/17,121.61 = 10,996.23/x
3. Step 3: Cross multiply
   12,411.10x = 17,121.61 × 10,996.23
4. Step 4: Simplify right side
   12,411.10x = 188,273,161.53
5. Step 5: Solve for x
   x = 188,273,161.53/12,411.10
6. Step 6: Final answer
   x = 15,169.74