Finding the Fourth Proportional to 2,092.78, 3,139.20 and 706.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,092.78 : 3,139.20 = 706.12 : x
2. Step 2: Convert to fraction form
   2,092.78/3,139.20 = 706.12/x
3. Step 3: Cross multiply
   2,092.78x = 3,139.20 × 706.12
4. Step 4: Simplify right side
   2,092.78x = 2,216,651.90
5. Step 5: Solve for x
   x = 2,216,651.90/2,092.78
6. Step 6: Final answer
   x = 1,059.19