Finding the Fourth Proportional to 1,039.80, 1,434.82 and 574.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.80 : 1,434.82 = 574.02 : x
2. Step 2: Convert to fraction form
   1,039.80/1,434.82 = 574.02/x
3. Step 3: Cross multiply
   1,039.80x = 1,434.82 × 574.02
4. Step 4: Simplify right side
   1,039.80x = 823,615.38
5. Step 5: Solve for x
   x = 823,615.38/1,039.80
6. Step 6: Final answer
   x = 792.09