Finding the Fourth Proportional to 3,086.04, 4,258.72 and 1,688.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,086.04 : 4,258.72 = 1,688.79 : x
2. Step 2: Convert to fraction form
   3,086.04/4,258.72 = 1,688.79/x
3. Step 3: Cross multiply
   3,086.04x = 4,258.72 × 1,688.79
4. Step 4: Simplify right side
   3,086.04x = 7,192,083.75
5. Step 5: Solve for x
   x = 7,192,083.75/3,086.04
6. Step 6: Final answer
   x = 2,330.52