Finding the Fourth Proportional to 2,015.34, 2,780.91 and 1,131.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.34 : 2,780.91 = 1,131.14 : x
2. Step 2: Convert to fraction form
   2,015.34/2,780.91 = 1,131.14/x
3. Step 3: Cross multiply
   2,015.34x = 2,780.91 × 1,131.14
4. Step 4: Simplify right side
   2,015.34x = 3,145,598.54
5. Step 5: Solve for x
   x = 3,145,598.54/2,015.34
6. Step 6: Final answer
   x = 1,560.83