Finding the Fourth Proportional to 1,039.25, 1,434.17 and 573.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.25 : 1,434.17 = 573.50 : x
2. Step 2: Convert to fraction form
   1,039.25/1,434.17 = 573.50/x
3. Step 3: Cross multiply
   1,039.25x = 1,434.17 × 573.50
4. Step 4: Simplify right side
   1,039.25x = 822,496.50
5. Step 5: Solve for x
   x = 822,496.50/1,039.25
6. Step 6: Final answer
   x = 791.43