Finding the Fourth Proportional to 2,279.92, 3,146.34 and 1,285.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.92 : 3,146.34 = 1,285.16 : x
2. Step 2: Convert to fraction form
   2,279.92/3,146.34 = 1,285.16/x
3. Step 3: Cross multiply
   2,279.92x = 3,146.34 × 1,285.16
4. Step 4: Simplify right side
   2,279.92x = 4,043,550.31
5. Step 5: Solve for x
   x = 4,043,550.31/2,279.92
6. Step 6: Final answer
   x = 1,773.55