Finding the Fourth Proportional to 2,283.78, 3,151.67 and 1,289.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,283.78 : 3,151.67 = 1,289.10 : x
2. Step 2: Convert to fraction form
   2,283.78/3,151.67 = 1,289.10/x
3. Step 3: Cross multiply
   2,283.78x = 3,151.67 × 1,289.10
4. Step 4: Simplify right side
   2,283.78x = 4,062,817.80
5. Step 5: Solve for x
   x = 4,062,817.80/2,283.78
6. Step 6: Final answer
   x = 1,778.99