Finding the Fourth Proportional to 2,111.38, 3,168.38 and 1,015.85

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.38 : 3,168.38 = 1,015.85 : x
2. Step 2: Convert to fraction form
   2,111.38/3,168.38 = 1,015.85/x
3. Step 3: Cross multiply
   2,111.38x = 3,168.38 × 1,015.85
4. Step 4: Simplify right side
   2,111.38x = 3,218,609.28
5. Step 5: Solve for x
   x = 3,218,609.28/2,111.38
6. Step 6: Final answer
   x = 1,524.41