Finding the Fourth Proportional to 2,283.57, 3,151.29 and 1,288.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,283.57 : 3,151.29 = 1,288.77 : x
2. Step 2: Convert to fraction form
   2,283.57/3,151.29 = 1,288.77/x
3. Step 3: Cross multiply
   2,283.57x = 3,151.29 × 1,288.77
4. Step 4: Simplify right side
   2,283.57x = 4,061,288.01
5. Step 5: Solve for x
   x = 4,061,288.01/2,283.57
6. Step 6: Final answer
   x = 1,778.48