Finding the Fourth Proportional to 2,094.39, 3,141.72 and 861.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,094.39 : 3,141.72 = 861.77 : x
2. Step 2: Convert to fraction form
   2,094.39/3,141.72 = 861.77/x
3. Step 3: Cross multiply
   2,094.39x = 3,141.72 × 861.77
4. Step 4: Simplify right side
   2,094.39x = 2,707,447.90
5. Step 5: Solve for x
   x = 2,707,447.90/2,094.39
6. Step 6: Final answer
   x = 1,292.71