Finding the Fourth Proportional to 3,991.39, 5,509.83 and 2,498.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,991.39 : 5,509.83 = 2,498.99 : x
2. Step 2: Convert to fraction form
   3,991.39/5,509.83 = 2,498.99/x
3. Step 3: Cross multiply
   3,991.39x = 5,509.83 × 2,498.99
4. Step 4: Simplify right side
   3,991.39x = 13,769,010.07
5. Step 5: Solve for x
   x = 13,769,010.07/3,991.39
6. Step 6: Final answer
   x = 3,449.68