Finding the Fourth Proportional to 2,015.86, 2,781.74 and 1,131.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.86 : 2,781.74 = 1,131.49 : x
2. Step 2: Convert to fraction form
   2,015.86/2,781.74 = 1,131.49/x
3. Step 3: Cross multiply
   2,015.86x = 2,781.74 × 1,131.49
4. Step 4: Simplify right side
   2,015.86x = 3,147,508.81
5. Step 5: Solve for x
   x = 3,147,508.81/2,015.86
6. Step 6: Final answer
   x = 1,561.37