Finding the Fourth Proportional to 15,839.10, 21,857.82 and 8,765.34

Step by Step Solution

1. Step 1: Write the proportion equation
   15,839.10 : 21,857.82 = 8,765.34 : x
2. Step 2: Convert to fraction form
   15,839.10/21,857.82 = 8,765.34/x
3. Step 3: Cross multiply
   15,839.10x = 21,857.82 × 8,765.34
4. Step 4: Simplify right side
   15,839.10x = 191,591,223.96
5. Step 5: Solve for x
   x = 191,591,223.96/15,839.10
6. Step 6: Final answer
   x = 12,096.09