Finding the Fourth Proportional to 21,063.42, 31,567.72 and 8,568.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,063.42 : 31,567.72 = 8,568.88 : x
2. Step 2: Convert to fraction form
   21,063.42/31,567.72 = 8,568.88/x
3. Step 3: Cross multiply
   21,063.42x = 31,567.72 × 8,568.88
4. Step 4: Simplify right side
   21,063.42x = 270,500,004.55
5. Step 5: Solve for x
   x = 270,500,004.55/21,063.42
6. Step 6: Final answer
   x = 12,842.17