Finding the Fourth Proportional to 3,981.18, 5,494.21 and 2,212.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.18 : 5,494.21 = 2,212.81 : x
2. Step 2: Convert to fraction form
   3,981.18/5,494.21 = 2,212.81/x
3. Step 3: Cross multiply
   3,981.18x = 5,494.21 × 2,212.81
4. Step 4: Simplify right side
   3,981.18x = 12,157,659.33
5. Step 5: Solve for x
   x = 12,157,659.33/3,981.18
6. Step 6: Final answer
   x = 3,053.78