Finding the Fourth Proportional to 2,279.39, 3,141.77 and 1,806.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.39 : 3,141.77 = 1,806.45 : x
2. Step 2: Convert to fraction form
   2,279.39/3,141.77 = 1,806.45/x
3. Step 3: Cross multiply
   2,279.39x = 3,141.77 × 1,806.45
4. Step 4: Simplify right side
   2,279.39x = 5,675,429.60
5. Step 5: Solve for x
   x = 5,675,429.60/2,279.39
6. Step 6: Final answer
   x = 2,489.90