Finding the Fourth Proportional to 3,936.33, 5,393.59 and 3,878.01

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.33 : 5,393.59 = 3,878.01 : x
2. Step 2: Convert to fraction form
   3,936.33/5,393.59 = 3,878.01/x
3. Step 3: Cross multiply
   3,936.33x = 5,393.59 × 3,878.01
4. Step 4: Simplify right side
   3,936.33x = 20,916,386.26
5. Step 5: Solve for x
   x = 20,916,386.26/3,936.33
6. Step 6: Final answer
   x = 5,313.68