Finding the Fourth Proportional to 3,820.72, 5,271.63 and 2,328.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,820.72 : 5,271.63 = 2,328.55 : x
2. Step 2: Convert to fraction form
   3,820.72/5,271.63 = 2,328.55/x
3. Step 3: Cross multiply
   3,820.72x = 5,271.63 × 2,328.55
4. Step 4: Simplify right side
   3,820.72x = 12,275,245.22
5. Step 5: Solve for x
   x = 12,275,245.22/3,820.72
6. Step 6: Final answer
   x = 3,212.81