Finding the Fourth Proportional to 2,015.54, 2,781.26 and 1,131.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.54 : 2,781.26 = 1,131.18 : x
2. Step 2: Convert to fraction form
   2,015.54/2,781.26 = 1,131.18/x
3. Step 3: Cross multiply
   2,015.54x = 2,781.26 × 1,131.18
4. Step 4: Simplify right side
   2,015.54x = 3,146,105.69
5. Step 5: Solve for x
   x = 3,146,105.69/2,015.54
6. Step 6: Final answer
   x = 1,560.92