Finding the Fourth Proportional to 3,312.72, 4,963.32 and 2,015.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,312.72 : 4,963.32 = 2,015.28 : x
2. Step 2: Convert to fraction form
   3,312.72/4,963.32 = 2,015.28/x
3. Step 3: Cross multiply
   3,312.72x = 4,963.32 × 2,015.28
4. Step 4: Simplify right side
   3,312.72x = 10,002,479.53
5. Step 5: Solve for x
   x = 10,002,479.53/3,312.72
6. Step 6: Final answer
   x = 3,019.42