Finding the Fourth Proportional to 1,039.46, 1,434.39 and 573.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.46 : 1,434.39 = 573.71 : x
2. Step 2: Convert to fraction form
   1,039.46/1,434.39 = 573.71/x
3. Step 3: Cross multiply
   1,039.46x = 1,434.39 × 573.71
4. Step 4: Simplify right side
   1,039.46x = 822,923.89
5. Step 5: Solve for x
   x = 822,923.89/1,039.46
6. Step 6: Final answer
   x = 791.68