Finding the Fourth Proportional to 3,981.25, 5,493.85 and 2,188.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.25 : 5,493.85 = 2,188.69 : x
2. Step 2: Convert to fraction form
   3,981.25/5,493.85 = 2,188.69/x
3. Step 3: Cross multiply
   3,981.25x = 5,493.85 × 2,188.69
4. Step 4: Simplify right side
   3,981.25x = 12,024,315.35
5. Step 5: Solve for x
   x = 12,024,315.35/3,981.25
6. Step 6: Final answer
   x = 3,020.24