Finding the Fourth Proportional to 2,093.77, 3,140.61 and 860.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,093.77 : 3,140.61 = 860.37 : x
2. Step 2: Convert to fraction form
   2,093.77/3,140.61 = 860.37/x
3. Step 3: Cross multiply
   2,093.77x = 3,140.61 × 860.37
4. Step 4: Simplify right side
   2,093.77x = 2,702,086.63
5. Step 5: Solve for x
   x = 2,702,086.63/2,093.77
6. Step 6: Final answer
   x = 1,290.54