Finding the Fourth Proportional to 2,093.84, 3,141.60 and 861.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,093.84 : 3,141.60 = 861.86 : x
2. Step 2: Convert to fraction form
   2,093.84/3,141.60 = 861.86/x
3. Step 3: Cross multiply
   2,093.84x = 3,141.60 × 861.86
4. Step 4: Simplify right side
   2,093.84x = 2,707,619.38
5. Step 5: Solve for x
   x = 2,707,619.38/2,093.84
6. Step 6: Final answer
   x = 1,293.14