Finding the Fourth Proportional to 3,981.30, 5,494.20 and 2,212.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.30 : 5,494.20 = 2,212.86 : x
2. Step 2: Convert to fraction form
   3,981.30/5,494.20 = 2,212.86/x
3. Step 3: Cross multiply
   3,981.30x = 5,494.20 × 2,212.86
4. Step 4: Simplify right side
   3,981.30x = 12,157,895.41
5. Step 5: Solve for x
   x = 12,157,895.41/3,981.30
6. Step 6: Final answer
   x = 3,053.75