Finding the Fourth Proportional to 12,339.72, 18,514.98 and 7,965.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,339.72 : 18,514.98 = 7,965.72 : x
2. Step 2: Convert to fraction form
   12,339.72/18,514.98 = 7,965.72/x
3. Step 3: Cross multiply
   12,339.72x = 18,514.98 × 7,965.72
4. Step 4: Simplify right side
   12,339.72x = 147,485,146.49
5. Step 5: Solve for x
   x = 147,485,146.49/12,339.72
6. Step 6: Final answer
   x = 11,952.07