Finding the Fourth Proportional to 2,279.73, 3,145.75 and 1,285.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.73 : 3,145.75 = 1,285.10 : x
2. Step 2: Convert to fraction form
   2,279.73/3,145.75 = 1,285.10/x
3. Step 3: Cross multiply
   2,279.73x = 3,145.75 × 1,285.10
4. Step 4: Simplify right side
   2,279.73x = 4,042,603.33
5. Step 5: Solve for x
   x = 4,042,603.33/2,279.73
6. Step 6: Final answer
   x = 1,773.28