Finding the Fourth Proportional to 21,104.66, 29,133.40 and 13,150.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,104.66 : 29,133.40 = 13,150.82 : x
2. Step 2: Convert to fraction form
   21,104.66/29,133.40 = 13,150.82/x
3. Step 3: Cross multiply
   21,104.66x = 29,133.40 × 13,150.82
4. Step 4: Simplify right side
   21,104.66x = 383,128,099.39
5. Step 5: Solve for x
   x = 383,128,099.39/21,104.66
6. Step 6: Final answer
   x = 18,153.72