Finding the Fourth Proportional to 2,175.39, 3,258.98 and 1,686.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.39 : 3,258.98 = 1,686.05 : x
2. Step 2: Convert to fraction form
   2,175.39/3,258.98 = 1,686.05/x
3. Step 3: Cross multiply
   2,175.39x = 3,258.98 × 1,686.05
4. Step 4: Simplify right side
   2,175.39x = 5,494,778.50
5. Step 5: Solve for x
   x = 5,494,778.50/2,175.39
6. Step 6: Final answer
   x = 2,525.88