Finding the Fourth Proportional to 21,147.17, 31,722.24 and 8,496.93

Step by Step Solution

1. Step 1: Write the proportion equation
   21,147.17 : 31,722.24 = 8,496.93 : x
2. Step 2: Convert to fraction form
   21,147.17/31,722.24 = 8,496.93/x
3. Step 3: Cross multiply
   21,147.17x = 31,722.24 × 8,496.93
4. Step 4: Simplify right side
   21,147.17x = 269,541,652.72
5. Step 5: Solve for x
   x = 269,541,652.72/21,147.17
6. Step 6: Final answer
   x = 12,745.99