Finding the Fourth Proportional to 6,859.69, 10,289.46 and 1,665.57

Step by Step Solution

1. Step 1: Write the proportion equation
   6,859.69 : 10,289.46 = 1,665.57 : x
2. Step 2: Convert to fraction form
   6,859.69/10,289.46 = 1,665.57/x
3. Step 3: Cross multiply
   6,859.69x = 10,289.46 × 1,665.57
4. Step 4: Simplify right side
   6,859.69x = 17,137,815.89
5. Step 5: Solve for x
   x = 17,137,815.89/6,859.69
6. Step 6: Final answer
   x = 2,498.34