Finding the Fourth Proportional to 21,591.33, 32,391.33 and 9,111.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,591.33 : 32,391.33 = 9,111.33 : x
2. Step 2: Convert to fraction form
   21,591.33/32,391.33 = 9,111.33/x
3. Step 3: Cross multiply
   21,591.33x = 32,391.33 × 9,111.33
4. Step 4: Simplify right side
   21,591.33x = 295,128,096.77
5. Step 5: Solve for x
   x = 295,128,096.77/21,591.33
6. Step 6: Final answer
   x = 13,668.82