Finding the Fourth Proportional to 1,039.52, 1,434.56 and 573.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.52 : 1,434.56 = 573.80 : x
2. Step 2: Convert to fraction form
   1,039.52/1,434.56 = 573.80/x
3. Step 3: Cross multiply
   1,039.52x = 1,434.56 × 573.80
4. Step 4: Simplify right side
   1,039.52x = 823,150.53
5. Step 5: Solve for x
   x = 823,150.53/1,039.52
6. Step 6: Final answer
   x = 791.86