Finding the Fourth Proportional to 13,667.69, 18,866.06 and 8,497.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.69 : 18,866.06 = 8,497.61 : x
2. Step 2: Convert to fraction form
   13,667.69/18,866.06 = 8,497.61/x
3. Step 3: Cross multiply
   13,667.69x = 18,866.06 × 8,497.61
4. Step 4: Simplify right side
   13,667.69x = 160,316,433.71
5. Step 5: Solve for x
   x = 160,316,433.71/13,667.69
6. Step 6: Final answer
   x = 11,729.60