Finding the Fourth Proportional to 2,092.77, 3,139.11 and 859.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.77 : 3,139.11 = 859.37 : x
2. Step 2: Convert to fraction form
   2,092.77/3,139.11 = 859.37/x
3. Step 3: Cross multiply
   2,092.77x = 3,139.11 × 859.37
4. Step 4: Simplify right side
   2,092.77x = 2,697,641.27
5. Step 5: Solve for x
   x = 2,697,641.27/2,092.77
6. Step 6: Final answer
   x = 1,289.03