Finding the Fourth Proportional to 13,912.48, 19,196.56 and 8,321.44

Step by Step Solution

1. Step 1: Write the proportion equation
   13,912.48 : 19,196.56 = 8,321.44 : x
2. Step 2: Convert to fraction form
   13,912.48/19,196.56 = 8,321.44/x
3. Step 3: Cross multiply
   13,912.48x = 19,196.56 × 8,321.44
4. Step 4: Simplify right side
   13,912.48x = 159,743,022.25
5. Step 5: Solve for x
   x = 159,743,022.25/13,912.48
6. Step 6: Final answer
   x = 11,481.99