Finding the Fourth Proportional to 2,012.76, 3,019.68 and 1,145.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.76 : 3,019.68 = 1,145.16 : x
2. Step 2: Convert to fraction form
   2,012.76/3,019.68 = 1,145.16/x
3. Step 3: Cross multiply
   2,012.76x = 3,019.68 × 1,145.16
4. Step 4: Simplify right side
   2,012.76x = 3,458,016.75
5. Step 5: Solve for x
   x = 3,458,016.75/2,012.76
6. Step 6: Final answer
   x = 1,718.05