Finding the Fourth Proportional to 2,092.06, 3,136.46 and 859.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.06 : 3,136.46 = 859.78 : x
2. Step 2: Convert to fraction form
   2,092.06/3,136.46 = 859.78/x
3. Step 3: Cross multiply
   2,092.06x = 3,136.46 × 859.78
4. Step 4: Simplify right side
   2,092.06x = 2,696,665.58
5. Step 5: Solve for x
   x = 2,696,665.58/2,092.06
6. Step 6: Final answer
   x = 1,289.00