Finding the Fourth Proportional to 1,009.08, 1,392.72 and 589.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.08 : 1,392.72 = 589.56 : x
2. Step 2: Convert to fraction form
   1,009.08/1,392.72 = 589.56/x
3. Step 3: Cross multiply
   1,009.08x = 1,392.72 × 589.56
4. Step 4: Simplify right side
   1,009.08x = 821,092.00
5. Step 5: Solve for x
   x = 821,092.00/1,009.08
6. Step 6: Final answer
   x = 813.70