Finding the Fourth Proportional to 2,279.78, 3,143.04 and 1,780.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.78 : 3,143.04 = 1,780.46 : x
2. Step 2: Convert to fraction form
   2,279.78/3,143.04 = 1,780.46/x
3. Step 3: Cross multiply
   2,279.78x = 3,143.04 × 1,780.46
4. Step 4: Simplify right side
   2,279.78x = 5,596,057.00
5. Step 5: Solve for x
   x = 5,596,057.00/2,279.78
6. Step 6: Final answer
   x = 2,454.65