Finding the Fourth Proportional to 21,300.75, 31,959.94 and 8,823.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.75 : 31,959.94 = 8,823.31 : x
2. Step 2: Convert to fraction form
   21,300.75/31,959.94 = 8,823.31/x
3. Step 3: Cross multiply
   21,300.75x = 31,959.94 × 8,823.31
4. Step 4: Simplify right side
   21,300.75x = 281,992,458.20
5. Step 5: Solve for x
   x = 281,992,458.20/21,300.75
6. Step 6: Final answer
   x = 13,238.62