Finding the Fourth Proportional to 2,092.61, 3,139.94 and 843.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.61 : 3,139.94 = 843.15 : x
2. Step 2: Convert to fraction form
   2,092.61/3,139.94 = 843.15/x
3. Step 3: Cross multiply
   2,092.61x = 3,139.94 × 843.15
4. Step 4: Simplify right side
   2,092.61x = 2,647,438.30
5. Step 5: Solve for x
   x = 2,647,438.30/2,092.61
6. Step 6: Final answer
   x = 1,265.14