Finding the Fourth Proportional to 1,008.73, 1,392.06 and 589.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.73 : 1,392.06 = 589.06 : x
2. Step 2: Convert to fraction form
   1,008.73/1,392.06 = 589.06/x
3. Step 3: Cross multiply
   1,008.73x = 1,392.06 × 589.06
4. Step 4: Simplify right side
   1,008.73x = 820,006.86
5. Step 5: Solve for x
   x = 820,006.86/1,008.73
6. Step 6: Final answer
   x = 812.91