Finding the Fourth Proportional to 1,018.37, 1,405.41 and 576.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.37 : 1,405.41 = 576.31 : x
2. Step 2: Convert to fraction form
   1,018.37/1,405.41 = 576.31/x
3. Step 3: Cross multiply
   1,018.37x = 1,405.41 × 576.31
4. Step 4: Simplify right side
   1,018.37x = 809,941.93
5. Step 5: Solve for x
   x = 809,941.93/1,018.37
6. Step 6: Final answer
   x = 795.34