Finding the Fourth Proportional to 2,051.72, 2,831.73 and 1,212.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.72 : 2,831.73 = 1,212.36 : x
2. Step 2: Convert to fraction form
   2,051.72/2,831.73 = 1,212.36/x
3. Step 3: Cross multiply
   2,051.72x = 2,831.73 × 1,212.36
4. Step 4: Simplify right side
   2,051.72x = 3,433,079.21
5. Step 5: Solve for x
   x = 3,433,079.21/2,051.72
6. Step 6: Final answer
   x = 1,673.27