Finding the Fourth Proportional to 21,196.48, 31,793.31 and 8,713.27

Step by Step Solution

1. Step 1: Write the proportion equation
   21,196.48 : 31,793.31 = 8,713.27 : x
2. Step 2: Convert to fraction form
   21,196.48/31,793.31 = 8,713.27/x
3. Step 3: Cross multiply
   21,196.48x = 31,793.31 × 8,713.27
4. Step 4: Simplify right side
   21,196.48x = 277,023,694.22
5. Step 5: Solve for x
   x = 277,023,694.22/21,196.48
6. Step 6: Final answer
   x = 13,069.33