Finding the Fourth Proportional to 1,040.25, 1,435.55 and 574.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.25 : 1,435.55 = 574.50 : x
2. Step 2: Convert to fraction form
   1,040.25/1,435.55 = 574.50/x
3. Step 3: Cross multiply
   1,040.25x = 1,435.55 × 574.50
4. Step 4: Simplify right side
   1,040.25x = 824,720.60
5. Step 5: Solve for x
   x = 824,720.60/1,040.25
6. Step 6: Final answer
   x = 792.81