Finding the Fourth Proportional to 11,901.45, 17,839.79 and 3,998.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,901.45 : 17,839.79 = 3,998.10 : x
2. Step 2: Convert to fraction form
   11,901.45/17,839.79 = 3,998.10/x
3. Step 3: Cross multiply
   11,901.45x = 17,839.79 × 3,998.10
4. Step 4: Simplify right side
   11,901.45x = 71,325,155.21
5. Step 5: Solve for x
   x = 71,325,155.21/11,901.45
6. Step 6: Final answer
   x = 5,992.98