Finding the Fourth Proportional to 20,910.09, 31,362.79 and 6,119.12

Step by Step Solution

1. Step 1: Write the proportion equation
   20,910.09 : 31,362.79 = 6,119.12 : x
2. Step 2: Convert to fraction form
   20,910.09/31,362.79 = 6,119.12/x
3. Step 3: Cross multiply
   20,910.09x = 31,362.79 × 6,119.12
4. Step 4: Simplify right side
   20,910.09x = 191,912,675.54
5. Step 5: Solve for x
   x = 191,912,675.54/20,910.09
6. Step 6: Final answer
   x = 9,177.99