Finding the Fourth Proportional to 2,015.48, 2,781.14 and 1,131.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.48 : 2,781.14 = 1,131.08 : x
2. Step 2: Convert to fraction form
   2,015.48/2,781.14 = 1,131.08/x
3. Step 3: Cross multiply
   2,015.48x = 2,781.14 × 1,131.08
4. Step 4: Simplify right side
   2,015.48x = 3,145,691.83
5. Step 5: Solve for x
   x = 3,145,691.83/2,015.48
6. Step 6: Final answer
   x = 1,560.77