Finding the Fourth Proportional to 1,786.41, 2,465.17 and 1,078.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,786.41 : 2,465.17 = 1,078.43 : x
2. Step 2: Convert to fraction form
   1,786.41/2,465.17 = 1,078.43/x
3. Step 3: Cross multiply
   1,786.41x = 2,465.17 × 1,078.43
4. Step 4: Simplify right side
   1,786.41x = 2,658,498.26
5. Step 5: Solve for x
   x = 2,658,498.26/1,786.41
6. Step 6: Final answer
   x = 1,488.18