Finding the Fourth Proportional to 2,284.35, 3,152.30 and 1,289.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,284.35 : 3,152.30 = 1,289.72 : x
2. Step 2: Convert to fraction form
   2,284.35/3,152.30 = 1,289.72/x
3. Step 3: Cross multiply
   2,284.35x = 3,152.30 × 1,289.72
4. Step 4: Simplify right side
   2,284.35x = 4,065,562.15
5. Step 5: Solve for x
   x = 4,065,562.15/2,284.35
6. Step 6: Final answer
   x = 1,779.75