Finding the Fourth Proportional to 2,284.28, 3,152.56 and 1,289.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,284.28 : 3,152.56 = 1,289.74 : x
2. Step 2: Convert to fraction form
   2,284.28/3,152.56 = 1,289.74/x
3. Step 3: Cross multiply
   2,284.28x = 3,152.56 × 1,289.74
4. Step 4: Simplify right side
   2,284.28x = 4,065,982.73
5. Step 5: Solve for x
   x = 4,065,982.73/2,284.28
6. Step 6: Final answer
   x = 1,779.98