Finding the Fourth Proportional to 1,057.05, 1,458.74 and 584.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.05 : 1,458.74 = 584.96 : x
2. Step 2: Convert to fraction form
   1,057.05/1,458.74 = 584.96/x
3. Step 3: Cross multiply
   1,057.05x = 1,458.74 × 584.96
4. Step 4: Simplify right side
   1,057.05x = 853,298.72
5. Step 5: Solve for x
   x = 853,298.72/1,057.05
6. Step 6: Final answer
   x = 807.25