Finding the Fourth Proportional to 21,826.66, 30,121.01 and 12,395.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,826.66 : 30,121.01 = 12,395.29 : x
2. Step 2: Convert to fraction form
   21,826.66/30,121.01 = 12,395.29/x
3. Step 3: Cross multiply
   21,826.66x = 30,121.01 × 12,395.29
4. Step 4: Simplify right side
   21,826.66x = 373,358,629.72
5. Step 5: Solve for x
   x = 373,358,629.72/21,826.66
6. Step 6: Final answer
   x = 17,105.62