Finding the Fourth Proportional to 21,983.34, 30,339.18 and 12,553.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,983.34 : 30,339.18 = 12,553.32 : x
2. Step 2: Convert to fraction form
   21,983.34/30,339.18 = 12,553.32/x
3. Step 3: Cross multiply
   21,983.34x = 30,339.18 × 12,553.32
4. Step 4: Simplify right side
   21,983.34x = 380,857,435.08
5. Step 5: Solve for x
   x = 380,857,435.08/21,983.34
6. Step 6: Final answer
   x = 17,324.82