Finding the Fourth Proportional to 2,559.47, 3,839.01 and 999.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.47 : 3,839.01 = 999.17 : x
2. Step 2: Convert to fraction form
   2,559.47/3,839.01 = 999.17/x
3. Step 3: Cross multiply
   2,559.47x = 3,839.01 × 999.17
4. Step 4: Simplify right side
   2,559.47x = 3,835,833.22
5. Step 5: Solve for x
   x = 3,835,833.22/2,559.47
6. Step 6: Final answer
   x = 1,498.69