Finding the Fourth Proportional to 12,196.54, 16,811.76 and 9,954.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.54 : 16,811.76 = 9,954.57 : x
2. Step 2: Convert to fraction form
   12,196.54/16,811.76 = 9,954.57/x
3. Step 3: Cross multiply
   12,196.54x = 16,811.76 × 9,954.57
4. Step 4: Simplify right side
   12,196.54x = 167,353,841.74
5. Step 5: Solve for x
   x = 167,353,841.74/12,196.54
6. Step 6: Final answer
   x = 13,721.42