Finding the Fourth Proportional to 2,279.99, 3,145.83 and 1,285.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.99 : 3,145.83 = 1,285.27 : x
2. Step 2: Convert to fraction form
   2,279.99/3,145.83 = 1,285.27/x
3. Step 3: Cross multiply
   2,279.99x = 3,145.83 × 1,285.27
4. Step 4: Simplify right side
   2,279.99x = 4,043,240.92
5. Step 5: Solve for x
   x = 4,043,240.92/2,279.99
6. Step 6: Final answer
   x = 1,773.36