Finding the Fourth Proportional to 2,051.31, 2,831.12 and 1,255.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.31 : 2,831.12 = 1,255.10 : x
2. Step 2: Convert to fraction form
   2,051.31/2,831.12 = 1,255.10/x
3. Step 3: Cross multiply
   2,051.31x = 2,831.12 × 1,255.10
4. Step 4: Simplify right side
   2,051.31x = 3,553,318.28
5. Step 5: Solve for x
   x = 3,553,318.28/2,051.31
6. Step 6: Final answer
   x = 1,732.22