Finding the Fourth Proportional to 1,018.50, 1,405.62 and 576.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.50 : 1,405.62 = 576.42 : x
2. Step 2: Convert to fraction form
   1,018.50/1,405.62 = 576.42/x
3. Step 3: Cross multiply
   1,018.50x = 1,405.62 × 576.42
4. Step 4: Simplify right side
   1,018.50x = 810,227.48
5. Step 5: Solve for x
   x = 810,227.48/1,018.50
6. Step 6: Final answer
   x = 795.51