Finding the Fourth Proportional to 2,172.41, 3,258.82 and 711.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.41 : 3,258.82 = 711.57 : x
2. Step 2: Convert to fraction form
   2,172.41/3,258.82 = 711.57/x
3. Step 3: Cross multiply
   2,172.41x = 3,258.82 × 711.57
4. Step 4: Simplify right side
   2,172.41x = 2,318,878.55
5. Step 5: Solve for x
   x = 2,318,878.55/2,172.41
6. Step 6: Final answer
   x = 1,067.42