Finding the Fourth Proportional to 11,906.78, 16,431.32 and 6,601.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,906.78 : 16,431.32 = 6,601.46 : x
2. Step 2: Convert to fraction form
   11,906.78/16,431.32 = 6,601.46/x
3. Step 3: Cross multiply
   11,906.78x = 16,431.32 × 6,601.46
4. Step 4: Simplify right side
   11,906.78x = 108,470,636.07
5. Step 5: Solve for x
   x = 108,470,636.07/11,906.78
6. Step 6: Final answer
   x = 9,109.99