Finding the Fourth Proportional to 21,759.26, 30,031.83 and 12,806.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,759.26 : 30,031.83 = 12,806.33 : x
2. Step 2: Convert to fraction form
   21,759.26/30,031.83 = 12,806.33/x
3. Step 3: Cross multiply
   21,759.26x = 30,031.83 × 12,806.33
4. Step 4: Simplify right side
   21,759.26x = 384,597,375.32
5. Step 5: Solve for x
   x = 384,597,375.32/21,759.26
6. Step 6: Final answer
   x = 17,675.12