Finding the Fourth Proportional to 20,945.82, 31,441.11 and 8,474.00

Step by Step Solution

1. Step 1: Write the proportion equation
   20,945.82 : 31,441.11 = 8,474.00 : x
2. Step 2: Convert to fraction form
   20,945.82/31,441.11 = 8,474.00/x
3. Step 3: Cross multiply
   20,945.82x = 31,441.11 × 8,474.00
4. Step 4: Simplify right side
   20,945.82x = 266,431,766.56
5. Step 5: Solve for x
   x = 266,431,766.56/20,945.82
6. Step 6: Final answer
   x = 12,720.04