Finding the Fourth Proportional to 2,788.88, 4,183.56 and 1,145.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,788.88 : 4,183.56 = 1,145.81 : x
2. Step 2: Convert to fraction form
   2,788.88/4,183.56 = 1,145.81/x
3. Step 3: Cross multiply
   2,788.88x = 4,183.56 × 1,145.81
4. Step 4: Simplify right side
   2,788.88x = 4,793,564.88
5. Step 5: Solve for x
   x = 4,793,564.88/2,788.88
6. Step 6: Final answer
   x = 1,718.81