Finding the Fourth Proportional to 2,559.97, 3,840.03 and 999.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,559.97 : 3,840.03 = 999.91 : x
2. Step 2: Convert to fraction form
   2,559.97/3,840.03 = 999.91/x
3. Step 3: Cross multiply
   2,559.97x = 3,840.03 × 999.91
4. Step 4: Simplify right side
   2,559.97x = 3,839,684.40
5. Step 5: Solve for x
   x = 3,839,684.40/2,559.97
6. Step 6: Final answer
   x = 1,499.89