Finding the Fourth Proportional to 1,039.36, 1,434.33 and 573.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.36 : 1,434.33 = 573.61 : x
2. Step 2: Convert to fraction form
   1,039.36/1,434.33 = 573.61/x
3. Step 3: Cross multiply
   1,039.36x = 1,434.33 × 573.61
4. Step 4: Simplify right side
   1,039.36x = 822,746.03
5. Step 5: Solve for x
   x = 822,746.03/1,039.36
6. Step 6: Final answer
   x = 791.59