Finding the Fourth Proportional to 2,093.62, 3,139.22 and 861.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,093.62 : 3,139.22 = 861.92 : x
2. Step 2: Convert to fraction form
   2,093.62/3,139.22 = 861.92/x
3. Step 3: Cross multiply
   2,093.62x = 3,139.22 × 861.92
4. Step 4: Simplify right side
   2,093.62x = 2,705,756.50
5. Step 5: Solve for x
   x = 2,705,756.50/2,093.62
6. Step 6: Final answer
   x = 1,292.38