Finding the Fourth Proportional to 2,662.33, 3,989.38 and 1,686.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.33 : 3,989.38 = 1,686.38 : x
2. Step 2: Convert to fraction form
   2,662.33/3,989.38 = 1,686.38/x
3. Step 3: Cross multiply
   2,662.33x = 3,989.38 × 1,686.38
4. Step 4: Simplify right side
   2,662.33x = 6,727,582.27
5. Step 5: Solve for x
   x = 6,727,582.27/2,662.33
6. Step 6: Final answer
   x = 2,526.96