Finding the Fourth Proportional to 11,456.16, 17,181.50 and 8,372.49

Step by Step Solution

1. Step 1: Write the proportion equation
   11,456.16 : 17,181.50 = 8,372.49 : x
2. Step 2: Convert to fraction form
   11,456.16/17,181.50 = 8,372.49/x
3. Step 3: Cross multiply
   11,456.16x = 17,181.50 × 8,372.49
4. Step 4: Simplify right side
   11,456.16x = 143,851,936.94
5. Step 5: Solve for x
   x = 143,851,936.94/11,456.16
6. Step 6: Final answer
   x = 12,556.73