Finding the Fourth Proportional to 2,092.10, 3,139.27 and 860.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.10 : 3,139.27 = 860.36 : x
2. Step 2: Convert to fraction form
   2,092.10/3,139.27 = 860.36/x
3. Step 3: Cross multiply
   2,092.10x = 3,139.27 × 860.36
4. Step 4: Simplify right side
   2,092.10x = 2,700,884.49
5. Step 5: Solve for x
   x = 2,700,884.49/2,092.10
6. Step 6: Final answer
   x = 1,291.00