Finding the Fourth Proportional to 2,093.30, 3,140.72 and 860.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,093.30 : 3,140.72 = 860.81 : x
2. Step 2: Convert to fraction form
   2,093.30/3,140.72 = 860.81/x
3. Step 3: Cross multiply
   2,093.30x = 3,140.72 × 860.81
4. Step 4: Simplify right side
   2,093.30x = 2,703,546.40
5. Step 5: Solve for x
   x = 2,703,546.40/2,093.30
6. Step 6: Final answer
   x = 1,291.52