Finding the Fourth Proportional to 8,839.40, 13,261.98 and 3,910.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,839.40 : 13,261.98 = 3,910.28 : x
2. Step 2: Convert to fraction form
   8,839.40/13,261.98 = 3,910.28/x
3. Step 3: Cross multiply
   8,839.40x = 13,261.98 × 3,910.28
4. Step 4: Simplify right side
   8,839.40x = 51,858,055.15
5. Step 5: Solve for x
   x = 51,858,055.15/8,839.40
6. Step 6: Final answer
   x = 5,866.69