Finding the Fourth Proportional to 16,864.61, 23,271.96 and 9,309.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,864.61 : 23,271.96 = 9,309.72 : x
2. Step 2: Convert to fraction form
   16,864.61/23,271.96 = 9,309.72/x
3. Step 3: Cross multiply
   16,864.61x = 23,271.96 × 9,309.72
4. Step 4: Simplify right side
   16,864.61x = 216,655,431.45
5. Step 5: Solve for x
   x = 216,655,431.45/16,864.61
6. Step 6: Final answer
   x = 12,846.75