Finding the Fourth Proportional to 21,798.28, 30,081.06 and 12,725.38

Step by Step Solution

1. Step 1: Write the proportion equation
   21,798.28 : 30,081.06 = 12,725.38 : x
2. Step 2: Convert to fraction form
   21,798.28/30,081.06 = 12,725.38/x
3. Step 3: Cross multiply
   21,798.28x = 30,081.06 × 12,725.38
4. Step 4: Simplify right side
   21,798.28x = 382,792,919.30
5. Step 5: Solve for x
   x = 382,792,919.30/21,798.28
6. Step 6: Final answer
   x = 17,560.69