Finding the Fourth Proportional to 11,968.56, 16,531.43 and 8,447.49

Step by Step Solution

1. Step 1: Write the proportion equation
   11,968.56 : 16,531.43 = 8,447.49 : x
2. Step 2: Convert to fraction form
   11,968.56/16,531.43 = 8,447.49/x
3. Step 3: Cross multiply
   11,968.56x = 16,531.43 × 8,447.49
4. Step 4: Simplify right side
   11,968.56x = 139,649,047.37
5. Step 5: Solve for x
   x = 139,649,047.37/11,968.56
6. Step 6: Final answer
   x = 11,667.99