Finding the Fourth Proportional to 1,018.62, 1,405.72 and 576.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.62 : 1,405.72 = 576.54 : x
2. Step 2: Convert to fraction form
   1,018.62/1,405.72 = 576.54/x
3. Step 3: Cross multiply
   1,018.62x = 1,405.72 × 576.54
4. Step 4: Simplify right side
   1,018.62x = 810,453.81
5. Step 5: Solve for x
   x = 810,453.81/1,018.62
6. Step 6: Final answer
   x = 795.64