Finding the Fourth Proportional to 11,910.05, 16,455.65 and 9,411.33

Step by Step Solution

1. Step 1: Write the proportion equation
   11,910.05 : 16,455.65 = 9,411.33 : x
2. Step 2: Convert to fraction form
   11,910.05/16,455.65 = 9,411.33/x
3. Step 3: Cross multiply
   11,910.05x = 16,455.65 × 9,411.33
4. Step 4: Simplify right side
   11,910.05x = 154,869,505.46
5. Step 5: Solve for x
   x = 154,869,505.46/11,910.05
6. Step 6: Final answer
   x = 13,003.27