Finding the Fourth Proportional to 2,279.52, 3,145.70 and 1,284.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.52 : 3,145.70 = 1,284.89 : x
2. Step 2: Convert to fraction form
   2,279.52/3,145.70 = 1,284.89/x
3. Step 3: Cross multiply
   2,279.52x = 3,145.70 × 1,284.89
4. Step 4: Simplify right side
   2,279.52x = 4,041,878.47
5. Step 5: Solve for x
   x = 4,041,878.47/2,279.52
6. Step 6: Final answer
   x = 1,773.13