Finding the Fourth Proportional to 2,279.25, 3,145.50 and 1,383.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.25 : 3,145.50 = 1,383.07 : x
2. Step 2: Convert to fraction form
   2,279.25/3,145.50 = 1,383.07/x
3. Step 3: Cross multiply
   2,279.25x = 3,145.50 × 1,383.07
4. Step 4: Simplify right side
   2,279.25x = 4,350,446.69
5. Step 5: Solve for x
   x = 4,350,446.69/2,279.25
6. Step 6: Final answer
   x = 1,908.72