Finding the Fourth Proportional to 10,728.50, 16,095.38 and 8,667.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,728.50 : 16,095.38 = 8,667.18 : x
2. Step 2: Convert to fraction form
   10,728.50/16,095.38 = 8,667.18/x
3. Step 3: Cross multiply
   10,728.50x = 16,095.38 × 8,667.18
4. Step 4: Simplify right side
   10,728.50x = 139,501,512.29
5. Step 5: Solve for x
   x = 139,501,512.29/10,728.50
6. Step 6: Final answer
   x = 13,002.90