Finding the Fourth Proportional to 11,910.38, 17,925.39 and 8,964.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,910.38 : 17,925.39 = 8,964.09 : x
2. Step 2: Convert to fraction form
   11,910.38/17,925.39 = 8,964.09/x
3. Step 3: Cross multiply
   11,910.38x = 17,925.39 × 8,964.09
4. Step 4: Simplify right side
   11,910.38x = 160,684,809.25
5. Step 5: Solve for x
   x = 160,684,809.25/11,910.38
6. Step 6: Final answer
   x = 13,491.16