Finding the Fourth Proportional to 2,171.18, 3,258.49 and 1,131.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,171.18 : 3,258.49 = 1,131.48 : x
2. Step 2: Convert to fraction form
   2,171.18/3,258.49 = 1,131.48/x
3. Step 3: Cross multiply
   2,171.18x = 3,258.49 × 1,131.48
4. Step 4: Simplify right side
   2,171.18x = 3,686,916.27
5. Step 5: Solve for x
   x = 3,686,916.27/2,171.18
6. Step 6: Final answer
   x = 1,698.12