Finding the Fourth Proportional to 13,028.50, 17,979.33 and 7,439.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,028.50 : 17,979.33 = 7,439.50 : x
2. Step 2: Convert to fraction form
   13,028.50/17,979.33 = 7,439.50/x
3. Step 3: Cross multiply
   13,028.50x = 17,979.33 × 7,439.50
4. Step 4: Simplify right side
   13,028.50x = 133,757,225.54
5. Step 5: Solve for x
   x = 133,757,225.54/13,028.50
6. Step 6: Final answer
   x = 10,266.51