Finding the Fourth Proportional to 2,005.43, 3,008.72 and 618.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,005.43 : 3,008.72 = 618.96 : x
2. Step 2: Convert to fraction form
   2,005.43/3,008.72 = 618.96/x
3. Step 3: Cross multiply
   2,005.43x = 3,008.72 × 618.96
4. Step 4: Simplify right side
   2,005.43x = 1,862,278.88
5. Step 5: Solve for x
   x = 1,862,278.88/2,005.43
6. Step 6: Final answer
   x = 928.62