Finding the Fourth Proportional to 15,667.67, 21,616.27 and 8,860.64

Step by Step Solution

1. Step 1: Write the proportion equation
   15,667.67 : 21,616.27 = 8,860.64 : x
2. Step 2: Convert to fraction form
   15,667.67/21,616.27 = 8,860.64/x
3. Step 3: Cross multiply
   15,667.67x = 21,616.27 × 8,860.64
4. Step 4: Simplify right side
   15,667.67x = 191,533,856.38
5. Step 5: Solve for x
   x = 191,533,856.38/15,667.67
6. Step 6: Final answer
   x = 12,224.78