Finding the Fourth Proportional to 1,056.91, 1,458.60 and 584.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.91 : 1,458.60 = 584.81 : x
2. Step 2: Convert to fraction form
   1,056.91/1,458.60 = 584.81/x
3. Step 3: Cross multiply
   1,056.91x = 1,458.60 × 584.81
4. Step 4: Simplify right side
   1,056.91x = 853,003.87
5. Step 5: Solve for x
   x = 853,003.87/1,056.91
6. Step 6: Final answer
   x = 807.07