Finding the Fourth Proportional to 2,279.89, 3,146.55 and 1,285.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.89 : 3,146.55 = 1,285.48 : x
2. Step 2: Convert to fraction form
   2,279.89/3,146.55 = 1,285.48/x
3. Step 3: Cross multiply
   2,279.89x = 3,146.55 × 1,285.48
4. Step 4: Simplify right side
   2,279.89x = 4,044,826.21
5. Step 5: Solve for x
   x = 4,044,826.21/2,279.89
6. Step 6: Final answer
   x = 1,774.13