Finding the Fourth Proportional to 12,168.38, 16,772.61 and 9,511.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,168.38 : 16,772.61 = 9,511.10 : x
2. Step 2: Convert to fraction form
   12,168.38/16,772.61 = 9,511.10/x
3. Step 3: Cross multiply
   12,168.38x = 16,772.61 × 9,511.10
4. Step 4: Simplify right side
   12,168.38x = 159,525,970.97
5. Step 5: Solve for x
   x = 159,525,970.97/12,168.38
6. Step 6: Final answer
   x = 13,109.88