Finding the Fourth Proportional to 21,726.22, 29,982.72 and 12,166.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,726.22 : 29,982.72 = 12,166.03 : x
2. Step 2: Convert to fraction form
   21,726.22/29,982.72 = 12,166.03/x
3. Step 3: Cross multiply
   21,726.22x = 29,982.72 × 12,166.03
4. Step 4: Simplify right side
   21,726.22x = 364,770,671.00
5. Step 5: Solve for x
   x = 364,770,671.00/21,726.22
6. Step 6: Final answer
   x = 16,789.42