Finding the Fourth Proportional to 3,981.20, 5,494.28 and 2,212.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.20 : 5,494.28 = 2,212.82 : x
2. Step 2: Convert to fraction form
   3,981.20/5,494.28 = 2,212.82/x
3. Step 3: Cross multiply
   3,981.20x = 5,494.28 × 2,212.82
4. Step 4: Simplify right side
   3,981.20x = 12,157,847.18
5. Step 5: Solve for x
   x = 12,157,847.18/3,981.20
6. Step 6: Final answer
   x = 3,053.81