Finding the Fourth Proportional to 9,211.98, 13,806.41 and 3,940.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,211.98 : 13,806.41 = 3,940.80 : x
2. Step 2: Convert to fraction form
   9,211.98/13,806.41 = 3,940.80/x
3. Step 3: Cross multiply
   9,211.98x = 13,806.41 × 3,940.80
4. Step 4: Simplify right side
   9,211.98x = 54,408,300.53
5. Step 5: Solve for x
   x = 54,408,300.53/9,211.98
6. Step 6: Final answer
   x = 5,906.25