Finding the Fourth Proportional to 2,283.62, 3,151.32 and 1,288.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,283.62 : 3,151.32 = 1,288.91 : x
2. Step 2: Convert to fraction form
   2,283.62/3,151.32 = 1,288.91/x
3. Step 3: Cross multiply
   2,283.62x = 3,151.32 × 1,288.91
4. Step 4: Simplify right side
   2,283.62x = 4,061,752.10
5. Step 5: Solve for x
   x = 4,061,752.10/2,283.62
6. Step 6: Final answer
   x = 1,778.65