Finding the Fourth Proportional to 21,339.50, 32,020.78 and 10,395.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,339.50 : 32,020.78 = 10,395.50 : x
2. Step 2: Convert to fraction form
   21,339.50/32,020.78 = 10,395.50/x
3. Step 3: Cross multiply
   21,339.50x = 32,020.78 × 10,395.50
4. Step 4: Simplify right side
   21,339.50x = 332,872,018.49
5. Step 5: Solve for x
   x = 332,872,018.49/21,339.50
6. Step 6: Final answer
   x = 15,598.87