Finding the Fourth Proportional to 2,015.53, 2,781.42 and 1,131.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.53 : 2,781.42 = 1,131.33 : x
2. Step 2: Convert to fraction form
   2,015.53/2,781.42 = 1,131.33/x
3. Step 3: Cross multiply
   2,015.53x = 2,781.42 × 1,131.33
4. Step 4: Simplify right side
   2,015.53x = 3,146,703.89
5. Step 5: Solve for x
   x = 3,146,703.89/2,015.53
6. Step 6: Final answer
   x = 1,561.23