Finding the Fourth Proportional to 13,936.04, 19,231.89 and 7,648.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,936.04 : 19,231.89 = 7,648.28 : x
2. Step 2: Convert to fraction form
   13,936.04/19,231.89 = 7,648.28/x
3. Step 3: Cross multiply
   13,936.04x = 19,231.89 × 7,648.28
4. Step 4: Simplify right side
   13,936.04x = 147,090,879.65
5. Step 5: Solve for x
   x = 147,090,879.65/13,936.04
6. Step 6: Final answer
   x = 10,554.71