Finding the Fourth Proportional to 21,192.93, 31,799.72 and 8,716.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,192.93 : 31,799.72 = 8,716.69 : x
2. Step 2: Convert to fraction form
   21,192.93/31,799.72 = 8,716.69/x
3. Step 3: Cross multiply
   21,192.93x = 31,799.72 × 8,716.69
4. Step 4: Simplify right side
   21,192.93x = 277,188,301.33
5. Step 5: Solve for x
   x = 277,188,301.33/21,192.93
6. Step 6: Final answer
   x = 13,079.28