Finding the Fourth Proportional to 11,899.72, 17,842.96 and 3,998.08

Step by Step Solution

1. Step 1: Write the proportion equation
   11,899.72 : 17,842.96 = 3,998.08 : x
2. Step 2: Convert to fraction form
   11,899.72/17,842.96 = 3,998.08/x
3. Step 3: Cross multiply
   11,899.72x = 17,842.96 × 3,998.08
4. Step 4: Simplify right side
   11,899.72x = 71,337,581.52
5. Step 5: Solve for x
   x = 71,337,581.52/11,899.72
6. Step 6: Final answer
   x = 5,994.90