Finding the Fourth Proportional to 6,910.79, 9,538.55 and 3,928.26

Step by Step Solution

1. Step 1: Write the proportion equation
   6,910.79 : 9,538.55 = 3,928.26 : x
2. Step 2: Convert to fraction form
   6,910.79/9,538.55 = 3,928.26/x
3. Step 3: Cross multiply
   6,910.79x = 9,538.55 × 3,928.26
4. Step 4: Simplify right side
   6,910.79x = 37,469,884.78
5. Step 5: Solve for x
   x = 37,469,884.78/6,910.79
6. Step 6: Final answer
   x = 5,421.94