Finding the Fourth Proportional to 21,759.06, 30,025.25 and 12,806.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,759.06 : 30,025.25 = 12,806.03 : x
2. Step 2: Convert to fraction form
   21,759.06/30,025.25 = 12,806.03/x
3. Step 3: Cross multiply
   21,759.06x = 30,025.25 × 12,806.03
4. Step 4: Simplify right side
   21,759.06x = 384,504,311.31
5. Step 5: Solve for x
   x = 384,504,311.31/21,759.06
6. Step 6: Final answer
   x = 17,671.00