Finding the Fourth Proportional to 3,936.96, 5,905.72 and 1,015.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936.96 : 5,905.72 = 1,015.28 : x
2. Step 2: Convert to fraction form
   3,936.96/5,905.72 = 1,015.28/x
3. Step 3: Cross multiply
   3,936.96x = 5,905.72 × 1,015.28
4. Step 4: Simplify right side
   3,936.96x = 5,995,959.40
5. Step 5: Solve for x
   x = 5,995,959.40/3,936.96
6. Step 6: Final answer
   x = 1,522.99