Finding the Fourth Proportional to 2,111.82, 3,167.28 and 725.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.82 : 3,167.28 = 725.22 : x
2. Step 2: Convert to fraction form
   2,111.82/3,167.28 = 725.22/x
3. Step 3: Cross multiply
   2,111.82x = 3,167.28 × 725.22
4. Step 4: Simplify right side
   2,111.82x = 2,296,974.80
5. Step 5: Solve for x
   x = 2,296,974.80/2,111.82
6. Step 6: Final answer
   x = 1,087.68