Finding the Fourth Proportional to 21,168.39, 31,753.82 and 7,127.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,168.39 : 31,753.82 = 7,127.24 : x
2. Step 2: Convert to fraction form
   21,168.39/31,753.82 = 7,127.24/x
3. Step 3: Cross multiply
   21,168.39x = 31,753.82 × 7,127.24
4. Step 4: Simplify right side
   21,168.39x = 226,317,133.72
5. Step 5: Solve for x
   x = 226,317,133.72/21,168.39
6. Step 6: Final answer
   x = 10,691.28