Finding the Fourth Proportional to 11,988.82, 17,951.72 and 9,636.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,988.82 : 17,951.72 = 9,636.34 : x
2. Step 2: Convert to fraction form
   11,988.82/17,951.72 = 9,636.34/x
3. Step 3: Cross multiply
   11,988.82x = 17,951.72 × 9,636.34
4. Step 4: Simplify right side
   11,988.82x = 172,988,877.50
5. Step 5: Solve for x
   x = 172,988,877.50/11,988.82
6. Step 6: Final answer
   x = 14,429.18