Finding the Fourth Proportional to 1,039.98, 1,435.16 and 574.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,039.98 : 1,435.16 = 574.23 : x
2. Step 2: Convert to fraction form
   1,039.98/1,435.16 = 574.23/x
3. Step 3: Cross multiply
   1,039.98x = 1,435.16 × 574.23
4. Step 4: Simplify right side
   1,039.98x = 824,109.06
5. Step 5: Solve for x
   x = 824,109.06/1,039.98
6. Step 6: Final answer
   x = 792.43