Finding the Fourth Proportional to 2,284.68, 3,152.85 and 1,290.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,284.68 : 3,152.85 = 1,290.28 : x
2. Step 2: Convert to fraction form
   2,284.68/3,152.85 = 1,290.28/x
3. Step 3: Cross multiply
   2,284.68x = 3,152.85 × 1,290.28
4. Step 4: Simplify right side
   2,284.68x = 4,068,059.30
5. Step 5: Solve for x
   x = 4,068,059.30/2,284.68
6. Step 6: Final answer
   x = 1,780.58