Finding the Fourth Proportional to 7,172.99, 10,766.18 and 3,665.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,172.99 : 10,766.18 = 3,665.42 : x
2. Step 2: Convert to fraction form
   7,172.99/10,766.18 = 3,665.42/x
3. Step 3: Cross multiply
   7,172.99x = 10,766.18 × 3,665.42
4. Step 4: Simplify right side
   7,172.99x = 39,462,571.50
5. Step 5: Solve for x
   x = 39,462,571.50/7,172.99
6. Step 6: Final answer
   x = 5,501.55