Finding the Fourth Proportional to 3,936.26, 5,407.72 and 3,522.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.26 : 5,407.72 = 3,522.09 : x
2. Step 2: Convert to fraction form
   3,936.26/5,407.72 = 3,522.09/x
3. Step 3: Cross multiply
   3,936.26x = 5,407.72 × 3,522.09
4. Step 4: Simplify right side
   3,936.26x = 19,046,476.53
5. Step 5: Solve for x
   x = 19,046,476.53/3,936.26
6. Step 6: Final answer
   x = 4,838.72