Finding the Fourth Proportional to 3,981.80, 5,494.84 and 2,213.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.80 : 5,494.84 = 2,213.37 : x
2. Step 2: Convert to fraction form
   3,981.80/5,494.84 = 2,213.37/x
3. Step 3: Cross multiply
   3,981.80x = 5,494.84 × 2,213.37
4. Step 4: Simplify right side
   3,981.80x = 12,162,108.48
5. Step 5: Solve for x
   x = 12,162,108.48/3,981.80
6. Step 6: Final answer
   x = 3,054.42