Finding the Fourth Proportional to 12,636.81, 17,433.17 and 7,328.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,636.81 : 17,433.17 = 7,328.55 : x
2. Step 2: Convert to fraction form
   12,636.81/17,433.17 = 7,328.55/x
3. Step 3: Cross multiply
   12,636.81x = 17,433.17 × 7,328.55
4. Step 4: Simplify right side
   12,636.81x = 127,759,914.22
5. Step 5: Solve for x
   x = 127,759,914.22/12,636.81
6. Step 6: Final answer
   x = 10,110.14