Finding the Fourth Proportional to 11,498.68, 17,241.52 and 3,998.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,498.68 : 17,241.52 = 3,998.78 : x
2. Step 2: Convert to fraction form
   11,498.68/17,241.52 = 3,998.78/x
3. Step 3: Cross multiply
   11,498.68x = 17,241.52 × 3,998.78
4. Step 4: Simplify right side
   11,498.68x = 68,945,078.45
5. Step 5: Solve for x
   x = 68,945,078.45/11,498.68
6. Step 6: Final answer
   x = 5,995.91