Finding the Fourth Proportional to 1,158.83, 1,738.25 and 389.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.83 : 1,738.25 = 389.33 : x
2. Step 2: Convert to fraction form
   1,158.83/1,738.25 = 389.33/x
3. Step 3: Cross multiply
   1,158.83x = 1,738.25 × 389.33
4. Step 4: Simplify right side
   1,158.83x = 676,748.53
5. Step 5: Solve for x
   x = 676,748.53/1,158.83
6. Step 6: Final answer
   x = 583.99