Finding the Fourth Proportional to 21,061.01, 31,564.19 and 8,566.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.01 : 31,564.19 = 8,566.49 : x
2. Step 2: Convert to fraction form
   21,061.01/31,564.19 = 8,566.49/x
3. Step 3: Cross multiply
   21,061.01x = 31,564.19 × 8,566.49
4. Step 4: Simplify right side
   21,061.01x = 270,394,418.32
5. Step 5: Solve for x
   x = 270,394,418.32/21,061.01
6. Step 6: Final answer
   x = 12,838.62