Finding the Fourth Proportional to 21,743.30, 30,005.37 and 12,183.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,743.30 : 30,005.37 = 12,183.15 : x
2. Step 2: Convert to fraction form
   21,743.30/30,005.37 = 12,183.15/x
3. Step 3: Cross multiply
   21,743.30x = 30,005.37 × 12,183.15
4. Step 4: Simplify right side
   21,743.30x = 365,559,877.83
5. Step 5: Solve for x
   x = 365,559,877.83/21,743.30
6. Step 6: Final answer
   x = 16,812.53