Finding the Fourth Proportional to 2,112.15, 3,168.68 and 1,072.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.15 : 3,168.68 = 1,072.29 : x
2. Step 2: Convert to fraction form
   2,112.15/3,168.68 = 1,072.29/x
3. Step 3: Cross multiply
   2,112.15x = 3,168.68 × 1,072.29
4. Step 4: Simplify right side
   2,112.15x = 3,397,743.88
5. Step 5: Solve for x
   x = 3,397,743.88/2,112.15
6. Step 6: Final answer
   x = 1,608.67