Finding the Fourth Proportional to 2,284.47, 3,152.61 and 1,289.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,284.47 : 3,152.61 = 1,289.70 : x
2. Step 2: Convert to fraction form
   2,284.47/3,152.61 = 1,289.70/x
3. Step 3: Cross multiply
   2,284.47x = 3,152.61 × 1,289.70
4. Step 4: Simplify right side
   2,284.47x = 4,065,921.12
5. Step 5: Solve for x
   x = 4,065,921.12/2,284.47
6. Step 6: Final answer
   x = 1,779.81