Finding the Fourth Proportional to 21,300.89, 31,960.13 and 8,823.44

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.89 : 31,960.13 = 8,823.44 : x
2. Step 2: Convert to fraction form
   21,300.89/31,960.13 = 8,823.44/x
3. Step 3: Cross multiply
   21,300.89x = 31,960.13 × 8,823.44
4. Step 4: Simplify right side
   21,300.89x = 281,998,085.53
5. Step 5: Solve for x
   x = 281,998,085.53/21,300.89
6. Step 6: Final answer
   x = 13,238.80