Finding the Fourth Proportional to 2,051.22, 2,831.72 and 1,212.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.22 : 2,831.72 = 1,212.18 : x
2. Step 2: Convert to fraction form
   2,051.22/2,831.72 = 1,212.18/x
3. Step 3: Cross multiply
   2,051.22x = 2,831.72 × 1,212.18
4. Step 4: Simplify right side
   2,051.22x = 3,432,554.35
5. Step 5: Solve for x
   x = 3,432,554.35/2,051.22
6. Step 6: Final answer
   x = 1,673.42