Finding the Fourth Proportional to 2,283.23, 3,151.05 and 1,288.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,283.23 : 3,151.05 = 1,288.55 : x
2. Step 2: Convert to fraction form
   2,283.23/3,151.05 = 1,288.55/x
3. Step 3: Cross multiply
   2,283.23x = 3,151.05 × 1,288.55
4. Step 4: Simplify right side
   2,283.23x = 4,060,285.48
5. Step 5: Solve for x
   x = 4,060,285.48/2,283.23
6. Step 6: Final answer
   x = 1,778.31