Finding the Fourth Proportional to 21,050.62, 31,548.49 and 8,556.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,050.62 : 31,548.49 = 8,556.04 : x
2. Step 2: Convert to fraction form
   21,050.62/31,548.49 = 8,556.04/x
3. Step 3: Cross multiply
   21,050.62x = 31,548.49 × 8,556.04
4. Step 4: Simplify right side
   21,050.62x = 269,930,142.38
5. Step 5: Solve for x
   x = 269,930,142.38/21,050.62
6. Step 6: Final answer
   x = 12,822.91