Finding the Fourth Proportional to 3,981.30, 5,493.96 and 2,212.80

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.30 : 5,493.96 = 2,212.80 : x
2. Step 2: Convert to fraction form
   3,981.30/5,493.96 = 2,212.80/x
3. Step 3: Cross multiply
   3,981.30x = 5,493.96 × 2,212.80
4. Step 4: Simplify right side
   3,981.30x = 12,157,034.69
5. Step 5: Solve for x
   x = 12,157,034.69/3,981.30
6. Step 6: Final answer
   x = 3,053.53