Finding the Fourth Proportional to 12,636, 17,436.60 and 8,159.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,636 : 17,436.60 = 8,159.94 : x
2. Step 2: Convert to fraction form
   12,636/17,436.60 = 8,159.94/x
3. Step 3: Cross multiply
   12,636x = 17,436.60 × 8,159.94
4. Step 4: Simplify right side
   12,636x = 142,281,609.80
5. Step 5: Solve for x
   x = 142,281,609.80/12,636
6. Step 6: Final answer
   x = 11,260.02