Finding the Fourth Proportional to 2,015.58, 2,781.46 and 1,131.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.58 : 2,781.46 = 1,131.46 : x
2. Step 2: Convert to fraction form
   2,015.58/2,781.46 = 1,131.46/x
3. Step 3: Cross multiply
   2,015.58x = 2,781.46 × 1,131.46
4. Step 4: Simplify right side
   2,015.58x = 3,147,110.73
5. Step 5: Solve for x
   x = 3,147,110.73/2,015.58
6. Step 6: Final answer
   x = 1,561.39