Finding the Fourth Proportional to 11,906.69, 17,856.20 and 4,007.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,906.69 : 17,856.20 = 4,007.05 : x
2. Step 2: Convert to fraction form
   11,906.69/17,856.20 = 4,007.05/x
3. Step 3: Cross multiply
   11,906.69x = 17,856.20 × 4,007.05
4. Step 4: Simplify right side
   11,906.69x = 71,550,651.59
5. Step 5: Solve for x
   x = 71,550,651.59/11,906.69
6. Step 6: Final answer
   x = 6,009.28