Finding the Fourth Proportional to 13,436.35, 18,548.90 and 8,967.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,436.35 : 18,548.90 = 8,967.31 : x
2. Step 2: Convert to fraction form
   13,436.35/18,548.90 = 8,967.31/x
3. Step 3: Cross multiply
   13,436.35x = 18,548.90 × 8,967.31
4. Step 4: Simplify right side
   13,436.35x = 166,333,678.88
5. Step 5: Solve for x
   x = 166,333,678.88/13,436.35
6. Step 6: Final answer
   x = 12,379.38