Finding the Fourth Proportional to 1,039.89, 1,435.05 and 574.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.89 : 1,435.05 = 574.14 : x
2. Step 2: Convert to fraction form
   1,039.89/1,435.05 = 574.14/x
3. Step 3: Cross multiply
   1,039.89x = 1,435.05 × 574.14
4. Step 4: Simplify right side
   1,039.89x = 823,919.61
5. Step 5: Solve for x
   x = 823,919.61/1,039.89
6. Step 6: Final answer
   x = 792.31