Finding the Fourth Proportional to 21,033.33, 31,518.82 and 8,538.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,033.33 : 31,518.82 = 8,538.15 : x
2. Step 2: Convert to fraction form
   21,033.33/31,518.82 = 8,538.15/x
3. Step 3: Cross multiply
   21,033.33x = 31,518.82 × 8,538.15
4. Step 4: Simplify right side
   21,033.33x = 269,112,412.98
5. Step 5: Solve for x
   x = 269,112,412.98/21,033.33
6. Step 6: Final answer
   x = 12,794.57