Finding the Fourth Proportional to 8,996.78, 12,427.67 and 8,158.43

Step by Step Solution

1. Step 1: Write the proportion equation
   8,996.78 : 12,427.67 = 8,158.43 : x
2. Step 2: Convert to fraction form
   8,996.78/12,427.67 = 8,158.43/x
3. Step 3: Cross multiply
   8,996.78x = 12,427.67 × 8,158.43
4. Step 4: Simplify right side
   8,996.78x = 101,390,327.22
5. Step 5: Solve for x
   x = 101,390,327.22/8,996.78
6. Step 6: Final answer
   x = 11,269.62