Finding the Fourth Proportional to 21,983.30, 30,336.89 and 11,912.00

Step by Step Solution

1. Step 1: Write the proportion equation
   21,983.30 : 30,336.89 = 11,912.00 : x
2. Step 2: Convert to fraction form
   21,983.30/30,336.89 = 11,912.00/x
3. Step 3: Cross multiply
   21,983.30x = 30,336.89 × 11,912.00
4. Step 4: Simplify right side
   21,983.30x = 361,372,822.44
5. Step 5: Solve for x
   x = 361,372,822.44/21,983.30
6. Step 6: Final answer
   x = 16,438.52