Finding the Fourth Proportional to 20,933.28, 31,379.76 and 7,074.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,933.28 : 31,379.76 = 7,074.72 : x
2. Step 2: Convert to fraction form
   20,933.28/31,379.76 = 7,074.72/x
3. Step 3: Cross multiply
   20,933.28x = 31,379.76 × 7,074.72
4. Step 4: Simplify right side
   20,933.28x = 222,003,015.67
5. Step 5: Solve for x
   x = 222,003,015.67/20,933.28
6. Step 6: Final answer
   x = 10,605.27