Finding the Fourth Proportional to 2,015.23, 2,781.06 and 1,131.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.23 : 2,781.06 = 1,131.10 : x
2. Step 2: Convert to fraction form
   2,015.23/2,781.06 = 1,131.10/x
3. Step 3: Cross multiply
   2,015.23x = 2,781.06 × 1,131.10
4. Step 4: Simplify right side
   2,015.23x = 3,145,656.97
5. Step 5: Solve for x
   x = 3,145,656.97/2,015.23
6. Step 6: Final answer
   x = 1,560.94