Finding the Fourth Proportional to 21,150.72, 31,725.44 and 8,002.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150.72 : 31,725.44 = 8,002.88 : x
2. Step 2: Convert to fraction form
   21,150.72/31,725.44 = 8,002.88/x
3. Step 3: Cross multiply
   21,150.72x = 31,725.44 × 8,002.88
4. Step 4: Simplify right side
   21,150.72x = 253,894,889.27
5. Step 5: Solve for x
   x = 253,894,889.27/21,150.72
6. Step 6: Final answer
   x = 12,004.08