Finding the Fourth Proportional to 2,254.66, 3,111.42 and 1,311

Step by Step Solution

1. Step 1: Write the proportion equation
   2,254.66 : 3,111.42 = 1,311 : x
2. Step 2: Convert to fraction form
   2,254.66/3,111.42 = 1,311/x
3. Step 3: Cross multiply
   2,254.66x = 3,111.42 × 1,311
4. Step 4: Simplify right side
   2,254.66x = 4,079,071.62
5. Step 5: Solve for x
   x = 4,079,071.62/2,254.66
6. Step 6: Final answer
   x = 1,809.18