Finding the Fourth Proportional to 2,056.71, 2,838.57 and 1,311

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.71 : 2,838.57 = 1,311 : x
2. Step 2: Convert to fraction form
   2,056.71/2,838.57 = 1,311/x
3. Step 3: Cross multiply
   2,056.71x = 2,838.57 × 1,311
4. Step 4: Simplify right side
   2,056.71x = 3,721,365.27
5. Step 5: Solve for x
   x = 3,721,365.27/2,056.71
6. Step 6: Final answer
   x = 1,809.38