Finding the Fourth Proportional to 2,283.51, 3,151.28 and 1,288.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,283.51 : 3,151.28 = 1,288.59 : x
2. Step 2: Convert to fraction form
   2,283.51/3,151.28 = 1,288.59/x
3. Step 3: Cross multiply
   2,283.51x = 3,151.28 × 1,288.59
4. Step 4: Simplify right side
   2,283.51x = 4,060,707.90
5. Step 5: Solve for x
   x = 4,060,707.90/2,283.51
6. Step 6: Final answer
   x = 1,778.28