Finding the Fourth Proportional to 16,553.43, 22,843.98 and 8,999.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,553.43 : 22,843.98 = 8,999.78 : x
2. Step 2: Convert to fraction form
   16,553.43/22,843.98 = 8,999.78/x
3. Step 3: Cross multiply
   16,553.43x = 22,843.98 × 8,999.78
4. Step 4: Simplify right side
   16,553.43x = 205,590,680.10
5. Step 5: Solve for x
   x = 205,590,680.10/16,553.43
6. Step 6: Final answer
   x = 12,419.82