Finding the Fourth Proportional to 3,728.61, 5,146.53 and 2,136.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,728.61 : 5,146.53 = 2,136.15 : x
2. Step 2: Convert to fraction form
   3,728.61/5,146.53 = 2,136.15/x
3. Step 3: Cross multiply
   3,728.61x = 5,146.53 × 2,136.15
4. Step 4: Simplify right side
   3,728.61x = 10,993,760.06
5. Step 5: Solve for x
   x = 10,993,760.06/3,728.61
6. Step 6: Final answer
   x = 2,948.49