Finding the Fourth Proportional to 10,028.30, 13,839.23 and 5,491.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,028.30 : 13,839.23 = 5,491.38 : x
2. Step 2: Convert to fraction form
   10,028.30/13,839.23 = 5,491.38/x
3. Step 3: Cross multiply
   10,028.30x = 13,839.23 × 5,491.38
4. Step 4: Simplify right side
   10,028.30x = 75,996,443.38
5. Step 5: Solve for x
   x = 75,996,443.38/10,028.30
6. Step 6: Final answer
   x = 7,578.20