Finding the Fourth Proportional to 2,559.69, 3,839.36 and 999.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.69 : 3,839.36 = 999.54 : x
2. Step 2: Convert to fraction form
   2,559.69/3,839.36 = 999.54/x
3. Step 3: Cross multiply
   2,559.69x = 3,839.36 × 999.54
4. Step 4: Simplify right side
   2,559.69x = 3,837,588.90
5. Step 5: Solve for x
   x = 3,837,588.90/2,559.69
6. Step 6: Final answer
   x = 1,499.24