Finding the Fourth Proportional to 3,612.56, 4,985.16 and 2,019.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,612.56 : 4,985.16 = 2,019.28 : x
2. Step 2: Convert to fraction form
   3,612.56/4,985.16 = 2,019.28/x
3. Step 3: Cross multiply
   3,612.56x = 4,985.16 × 2,019.28
4. Step 4: Simplify right side
   3,612.56x = 10,066,433.88
5. Step 5: Solve for x
   x = 10,066,433.88/3,612.56
6. Step 6: Final answer
   x = 2,786.51