Finding the Fourth Proportional to 21,323, 31,940.82 and 10,778.24

Step by Step Solution

1. Step 1: Write the proportion equation
   21,323 : 31,940.82 = 10,778.24 : x
2. Step 2: Convert to fraction form
   21,323/31,940.82 = 10,778.24/x
3. Step 3: Cross multiply
   21,323x = 31,940.82 × 10,778.24
4. Step 4: Simplify right side
   21,323x = 344,265,823.76
5. Step 5: Solve for x
   x = 344,265,823.76/21,323
6. Step 6: Final answer
   x = 16,145.28