Finding the Fourth Proportional to 2,111.67, 3,167.91 and 1,072.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.67 : 3,167.91 = 1,072.24 : x
2. Step 2: Convert to fraction form
   2,111.67/3,167.91 = 1,072.24/x
3. Step 3: Cross multiply
   2,111.67x = 3,167.91 × 1,072.24
4. Step 4: Simplify right side
   2,111.67x = 3,396,751.90
5. Step 5: Solve for x
   x = 3,396,751.90/2,111.67
6. Step 6: Final answer
   x = 1,608.56