Finding the Fourth Proportional to 3,772.69, 5,211.30 and 3,145.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,772.69 : 5,211.30 = 3,145.27 : x
2. Step 2: Convert to fraction form
   3,772.69/5,211.30 = 3,145.27/x
3. Step 3: Cross multiply
   3,772.69x = 5,211.30 × 3,145.27
4. Step 4: Simplify right side
   3,772.69x = 16,390,945.55
5. Step 5: Solve for x
   x = 16,390,945.55/3,772.69
6. Step 6: Final answer
   x = 4,344.63