Finding the Fourth Proportional to 13,196.04, 18,201.78 and 8,486.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.04 : 18,201.78 = 8,486.28 : x
2. Step 2: Convert to fraction form
   13,196.04/18,201.78 = 8,486.28/x
3. Step 3: Cross multiply
   13,196.04x = 18,201.78 × 8,486.28
4. Step 4: Simplify right side
   13,196.04x = 154,465,401.58
5. Step 5: Solve for x
   x = 154,465,401.58/13,196.04
6. Step 6: Final answer
   x = 11,705.44