Finding the Fourth Proportional to 1,039.42, 1,434.27 and 573.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.42 : 1,434.27 = 573.58 : x
2. Step 2: Convert to fraction form
   1,039.42/1,434.27 = 573.58/x
3. Step 3: Cross multiply
   1,039.42x = 1,434.27 × 573.58
4. Step 4: Simplify right side
   1,039.42x = 822,668.59
5. Step 5: Solve for x
   x = 822,668.59/1,039.42
6. Step 6: Final answer
   x = 791.47