Finding the Fourth Proportional to 21,336.96, 31,978.56 and 10,234.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,336.96 : 31,978.56 = 10,234.56 : x
2. Step 2: Convert to fraction form
   21,336.96/31,978.56 = 10,234.56/x
3. Step 3: Cross multiply
   21,336.96x = 31,978.56 × 10,234.56
4. Step 4: Simplify right side
   21,336.96x = 327,286,491.03
5. Step 5: Solve for x
   x = 327,286,491.03/21,336.96
6. Step 6: Final answer
   x = 15,338.95