Finding the Fourth Proportional to 2,092.69, 3,139.26 and 859.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.69 : 3,139.26 = 859.38 : x
2. Step 2: Convert to fraction form
   2,092.69/3,139.26 = 859.38/x
3. Step 3: Cross multiply
   2,092.69x = 3,139.26 × 859.38
4. Step 4: Simplify right side
   2,092.69x = 2,697,828.75
5. Step 5: Solve for x
   x = 2,697,828.75/2,092.69
6. Step 6: Final answer
   x = 1,289.17