Finding the Fourth Proportional to 2,462.72, 3,678.85 and 2,215.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,462.72 : 3,678.85 = 2,215.55 : x
2. Step 2: Convert to fraction form
   2,462.72/3,678.85 = 2,215.55/x
3. Step 3: Cross multiply
   2,462.72x = 3,678.85 × 2,215.55
4. Step 4: Simplify right side
   2,462.72x = 8,150,652.18
5. Step 5: Solve for x
   x = 8,150,652.18/2,462.72
6. Step 6: Final answer
   x = 3,309.61