Finding the Fourth Proportional to 1,018.96, 1,406.12 and 576.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.96 : 1,406.12 = 576.87 : x
2. Step 2: Convert to fraction form
   1,018.96/1,406.12 = 576.87/x
3. Step 3: Cross multiply
   1,018.96x = 1,406.12 × 576.87
4. Step 4: Simplify right side
   1,018.96x = 811,146.17
5. Step 5: Solve for x
   x = 811,146.17/1,018.96
6. Step 6: Final answer
   x = 796.05