Finding the Fourth Proportional to 21,132.37, 29,169.15 and 12,185.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,132.37 : 29,169.15 = 12,185.83 : x
2. Step 2: Convert to fraction form
   21,132.37/29,169.15 = 12,185.83/x
3. Step 3: Cross multiply
   21,132.37x = 29,169.15 × 12,185.83
4. Step 4: Simplify right side
   21,132.37x = 355,450,303.14
5. Step 5: Solve for x
   x = 355,450,303.14/21,132.37
6. Step 6: Final answer
   x = 16,820.18