Finding the Fourth Proportional to 1,018.32, 1,405.31 and 576.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.32 : 1,405.31 = 576.23 : x
2. Step 2: Convert to fraction form
   1,018.32/1,405.31 = 576.23/x
3. Step 3: Cross multiply
   1,018.32x = 1,405.31 × 576.23
4. Step 4: Simplify right side
   1,018.32x = 809,781.78
5. Step 5: Solve for x
   x = 809,781.78/1,018.32
6. Step 6: Final answer
   x = 795.21