Finding the Fourth Proportional to 15,271.72, 21,064.69 and 8,984.09

Step by Step Solution

1. Step 1: Write the proportion equation
   15,271.72 : 21,064.69 = 8,984.09 : x
2. Step 2: Convert to fraction form
   15,271.72/21,064.69 = 8,984.09/x
3. Step 3: Cross multiply
   15,271.72x = 21,064.69 × 8,984.09
4. Step 4: Simplify right side
   15,271.72x = 189,247,134.67
5. Step 5: Solve for x
   x = 189,247,134.67/15,271.72
6. Step 6: Final answer
   x = 12,392.00