Finding the Fourth Proportional to 21,227.82, 31,829.52 and 8,756.42

Step by Step Solution

1. Step 1: Write the proportion equation
   21,227.82 : 31,829.52 = 8,756.42 : x
2. Step 2: Convert to fraction form
   21,227.82/31,829.52 = 8,756.42/x
3. Step 3: Cross multiply
   21,227.82x = 31,829.52 × 8,756.42
4. Step 4: Simplify right side
   21,227.82x = 278,712,645.52
5. Step 5: Solve for x
   x = 278,712,645.52/21,227.82
6. Step 6: Final answer
   x = 13,129.59