Finding the Fourth Proportional to 3,085.50, 4,258.08 and 1,688.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,085.50 : 4,258.08 = 1,688.34 : x
2. Step 2: Convert to fraction form
   3,085.50/4,258.08 = 1,688.34/x
3. Step 3: Cross multiply
   3,085.50x = 4,258.08 × 1,688.34
4. Step 4: Simplify right side
   3,085.50x = 7,189,086.79
5. Step 5: Solve for x
   x = 7,189,086.79/3,085.50
6. Step 6: Final answer
   x = 2,329.96