Finding the Fourth Proportional to 8,002.72, 12,004.30 and 2,159.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,002.72 : 12,004.30 = 2,159.31 : x
2. Step 2: Convert to fraction form
   8,002.72/12,004.30 = 2,159.31/x
3. Step 3: Cross multiply
   8,002.72x = 12,004.30 × 2,159.31
4. Step 4: Simplify right side
   8,002.72x = 25,921,005.03
5. Step 5: Solve for x
   x = 25,921,005.03/8,002.72
6. Step 6: Final answer
   x = 3,239.02