Finding the Fourth Proportional to 2,186.62, 3,016.56 and 1,255.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,186.62 : 3,016.56 = 1,255.12 : x
2. Step 2: Convert to fraction form
   2,186.62/3,016.56 = 1,255.12/x
3. Step 3: Cross multiply
   2,186.62x = 3,016.56 × 1,255.12
4. Step 4: Simplify right side
   2,186.62x = 3,786,144.79
5. Step 5: Solve for x
   x = 3,786,144.79/2,186.62
6. Step 6: Final answer
   x = 1,731.51