Finding the Fourth Proportional to 21,034.52, 31,557.73 and 8,563.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,034.52 : 31,557.73 = 8,563.49 : x
2. Step 2: Convert to fraction form
   21,034.52/31,557.73 = 8,563.49/x
3. Step 3: Cross multiply
   21,034.52x = 31,557.73 × 8,563.49
4. Step 4: Simplify right side
   21,034.52x = 270,244,147.49
5. Step 5: Solve for x
   x = 270,244,147.49/21,034.52
6. Step 6: Final answer
   x = 12,847.65