Finding the Fourth Proportional to 17,013.14, 25,471.78 and 12,839.88

Step by Step Solution

1. Step 1: Write the proportion equation
   17,013.14 : 25,471.78 = 12,839.88 : x
2. Step 2: Convert to fraction form
   17,013.14/25,471.78 = 12,839.88/x
3. Step 3: Cross multiply
   17,013.14x = 25,471.78 × 12,839.88
4. Step 4: Simplify right side
   17,013.14x = 327,054,598.59
5. Step 5: Solve for x
   x = 327,054,598.59/17,013.14
6. Step 6: Final answer
   x = 19,223.65