Finding the Fourth Proportional to 16,863.78, 23,271.89 and 9,310.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,863.78 : 23,271.89 = 9,310.12 : x
2. Step 2: Convert to fraction form
   16,863.78/23,271.89 = 9,310.12/x
3. Step 3: Cross multiply
   16,863.78x = 23,271.89 × 9,310.12
4. Step 4: Simplify right side
   16,863.78x = 216,663,983.80
5. Step 5: Solve for x
   x = 216,663,983.80/16,863.78
6. Step 6: Final answer
   x = 12,847.89