Finding the Fourth Proportional to 1,039.61, 1,434.56 and 573.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.61 : 1,434.56 = 573.83 : x
2. Step 2: Convert to fraction form
   1,039.61/1,434.56 = 573.83/x
3. Step 3: Cross multiply
   1,039.61x = 1,434.56 × 573.83
4. Step 4: Simplify right side
   1,039.61x = 823,193.56
5. Step 5: Solve for x
   x = 823,193.56/1,039.61
6. Step 6: Final answer
   x = 791.83