Finding the Fourth Proportional to 1,158.82, 1,738.23 and 389.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,158.82 : 1,738.23 = 389.86 : x
2. Step 2: Convert to fraction form
   1,158.82/1,738.23 = 389.86/x
3. Step 3: Cross multiply
   1,158.82x = 1,738.23 × 389.86
4. Step 4: Simplify right side
   1,158.82x = 677,666.35
5. Step 5: Solve for x
   x = 677,666.35/1,158.82
6. Step 6: Final answer
   x = 584.79