Finding the Fourth Proportional to 21,741.48, 30,003.30 and 12,311.82

Step by Step Solution

1. Step 1: Write the proportion equation
   21,741.48 : 30,003.30 = 12,311.82 : x
2. Step 2: Convert to fraction form
   21,741.48/30,003.30 = 12,311.82/x
3. Step 3: Cross multiply
   21,741.48x = 30,003.30 × 12,311.82
4. Step 4: Simplify right side
   21,741.48x = 369,395,229.01
5. Step 5: Solve for x
   x = 369,395,229.01/21,741.48
6. Step 6: Final answer
   x = 16,990.34