Finding the Fourth Proportional to 2,015.34, 2,781.37 and 1,131.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.34 : 2,781.37 = 1,131.36 : x
2. Step 2: Convert to fraction form
   2,015.34/2,781.37 = 1,131.36/x
3. Step 3: Cross multiply
   2,015.34x = 2,781.37 × 1,131.36
4. Step 4: Simplify right side
   2,015.34x = 3,146,730.76
5. Step 5: Solve for x
   x = 3,146,730.76/2,015.34
6. Step 6: Final answer
   x = 1,561.39