Finding the Fourth Proportional to 3,981.99, 5,494.89 and 2,213.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.99 : 5,494.89 = 2,213.55 : x
2. Step 2: Convert to fraction form
   3,981.99/5,494.89 = 2,213.55/x
3. Step 3: Cross multiply
   3,981.99x = 5,494.89 × 2,213.55
4. Step 4: Simplify right side
   3,981.99x = 12,163,213.76
5. Step 5: Solve for x
   x = 12,163,213.76/3,981.99
6. Step 6: Final answer
   x = 3,054.56