Finding the Fourth Proportional to 21,960.24, 32,921.89 and 17,789.91

Step by Step Solution

1. Step 1: Write the proportion equation
   21,960.24 : 32,921.89 = 17,789.91 : x
2. Step 2: Convert to fraction form
   21,960.24/32,921.89 = 17,789.91/x
3. Step 3: Cross multiply
   21,960.24x = 32,921.89 × 17,789.91
4. Step 4: Simplify right side
   21,960.24x = 585,677,460.13
5. Step 5: Solve for x
   x = 585,677,460.13/21,960.24
6. Step 6: Final answer
   x = 26,669.90