Finding the Fourth Proportional to 2,283.83, 3,151.70 and 1,289.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,283.83 : 3,151.70 = 1,289.12 : x
2. Step 2: Convert to fraction form
   2,283.83/3,151.70 = 1,289.12/x
3. Step 3: Cross multiply
   2,283.83x = 3,151.70 × 1,289.12
4. Step 4: Simplify right side
   2,283.83x = 4,062,913.06
5. Step 5: Solve for x
   x = 4,062,913.06/2,283.83
6. Step 6: Final answer
   x = 1,778.99