Finding the Fourth Proportional to 3,981.86, 5,495.04 and 2,189.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.86 : 5,495.04 = 2,189.42 : x
2. Step 2: Convert to fraction form
   3,981.86/5,495.04 = 2,189.42/x
3. Step 3: Cross multiply
   3,981.86x = 5,495.04 × 2,189.42
4. Step 4: Simplify right side
   3,981.86x = 12,030,950.48
5. Step 5: Solve for x
   x = 12,030,950.48/3,981.86
6. Step 6: Final answer
   x = 3,021.44