Finding the Fourth Proportional to 3,981.78, 5,494.62 and 2,213.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.78 : 5,494.62 = 2,213.34 : x
2. Step 2: Convert to fraction form
   3,981.78/5,494.62 = 2,213.34/x
3. Step 3: Cross multiply
   3,981.78x = 5,494.62 × 2,213.34
4. Step 4: Simplify right side
   3,981.78x = 12,161,462.23
5. Step 5: Solve for x
   x = 12,161,462.23/3,981.78
6. Step 6: Final answer
   x = 3,054.28