Finding the Fourth Proportional to 1,018.93, 1,406.15 and 576.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.93 : 1,406.15 = 576.81 : x
2. Step 2: Convert to fraction form
   1,018.93/1,406.15 = 576.81/x
3. Step 3: Cross multiply
   1,018.93x = 1,406.15 × 576.81
4. Step 4: Simplify right side
   1,018.93x = 811,081.38
5. Step 5: Solve for x
   x = 811,081.38/1,018.93
6. Step 6: Final answer
   x = 796.01