Finding the Fourth Proportional to 1,018.71, 1,405.82 and 576.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.71 : 1,405.82 = 576.72 : x
2. Step 2: Convert to fraction form
   1,018.71/1,405.82 = 576.72/x
3. Step 3: Cross multiply
   1,018.71x = 1,405.82 × 576.72
4. Step 4: Simplify right side
   1,018.71x = 810,765.95
5. Step 5: Solve for x
   x = 810,765.95/1,018.71
6. Step 6: Final answer
   x = 795.88