Finding the Fourth Proportional to 1,145.58, 1,726.83 and 1,078.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.58 : 1,726.83 = 1,078.68 : x
2. Step 2: Convert to fraction form
   1,145.58/1,726.83 = 1,078.68/x
3. Step 3: Cross multiply
   1,145.58x = 1,726.83 × 1,078.68
4. Step 4: Simplify right side
   1,145.58x = 1,862,696.98
5. Step 5: Solve for x
   x = 1,862,696.98/1,145.58
6. Step 6: Final answer
   x = 1,625.99