Finding the Fourth Proportional to 21,061.97, 31,584.18 and 8,573.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,061.97 : 31,584.18 = 8,573.52 : x
2. Step 2: Convert to fraction form
   21,061.97/31,584.18 = 8,573.52/x
3. Step 3: Cross multiply
   21,061.97x = 31,584.18 × 8,573.52
4. Step 4: Simplify right side
   21,061.97x = 270,787,612.45
5. Step 5: Solve for x
   x = 270,787,612.45/21,061.97
6. Step 6: Final answer
   x = 12,856.71