Finding the Fourth Proportional to 1,018.47, 1,405.53 and 576.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.47 : 1,405.53 = 576.37 : x
2. Step 2: Convert to fraction form
   1,018.47/1,405.53 = 576.37/x
3. Step 3: Cross multiply
   1,018.47x = 1,405.53 × 576.37
4. Step 4: Simplify right side
   1,018.47x = 810,097.56
5. Step 5: Solve for x
   x = 810,097.56/1,018.47
6. Step 6: Final answer
   x = 795.40