Finding the Fourth Proportional to 1,078.18, 1,616.72 and 384.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.18 : 1,616.72 = 384.73 : x
2. Step 2: Convert to fraction form
   1,078.18/1,616.72 = 384.73/x
3. Step 3: Cross multiply
   1,078.18x = 1,616.72 × 384.73
4. Step 4: Simplify right side
   1,078.18x = 621,994.72
5. Step 5: Solve for x
   x = 621,994.72/1,078.18
6. Step 6: Final answer
   x = 576.89