Finding the Fourth Proportional to 10,686.53, 16,031.67 and 3,667.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,686.53 : 16,031.67 = 3,667.28 : x
2. Step 2: Convert to fraction form
   10,686.53/16,031.67 = 3,667.28/x
3. Step 3: Cross multiply
   10,686.53x = 16,031.67 × 3,667.28
4. Step 4: Simplify right side
   10,686.53x = 58,792,662.84
5. Step 5: Solve for x
   x = 58,792,662.84/10,686.53
6. Step 6: Final answer
   x = 5,501.57