Finding the Fourth Proportional to 2,486.07, 3,429.67 and 1,688.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486.07 : 3,429.67 = 1,688.42 : x
2. Step 2: Convert to fraction form
   2,486.07/3,429.67 = 1,688.42/x
3. Step 3: Cross multiply
   2,486.07x = 3,429.67 × 1,688.42
4. Step 4: Simplify right side
   2,486.07x = 5,790,723.42
5. Step 5: Solve for x
   x = 5,790,723.42/2,486.07
6. Step 6: Final answer
   x = 2,329.27