Finding the Fourth Proportional to 21,443.33, 32,170.76 and 8,959.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,443.33 : 32,170.76 = 8,959.20 : x
2. Step 2: Convert to fraction form
   21,443.33/32,170.76 = 8,959.20/x
3. Step 3: Cross multiply
   21,443.33x = 32,170.76 × 8,959.20
4. Step 4: Simplify right side
   21,443.33x = 288,224,228.20
5. Step 5: Solve for x
   x = 288,224,228.20/21,443.33
6. Step 6: Final answer
   x = 13,441.21