Finding the Fourth Proportional to 11,388.96, 17,091.12 and 3,993.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,388.96 : 17,091.12 = 3,993.48 : x
2. Step 2: Convert to fraction form
   11,388.96/17,091.12 = 3,993.48/x
3. Step 3: Cross multiply
   11,388.96x = 17,091.12 × 3,993.48
4. Step 4: Simplify right side
   11,388.96x = 68,253,045.90
5. Step 5: Solve for x
   x = 68,253,045.90/11,388.96
6. Step 6: Final answer
   x = 5,992.91