Finding the Fourth Proportional to 8,271.02, 12,468.52 and 7,721.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,271.02 : 12,468.52 = 7,721.12 : x
2. Step 2: Convert to fraction form
   8,271.02/12,468.52 = 7,721.12/x
3. Step 3: Cross multiply
   8,271.02x = 12,468.52 × 7,721.12
4. Step 4: Simplify right side
   8,271.02x = 96,270,939.14
5. Step 5: Solve for x
   x = 96,270,939.14/8,271.02
6. Step 6: Final answer
   x = 11,639.55