Finding the Fourth Proportional to 19,906.81, 27,470.81 and 10,954.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,906.81 : 27,470.81 = 10,954.31 : x
2. Step 2: Convert to fraction form
   19,906.81/27,470.81 = 10,954.31/x
3. Step 3: Cross multiply
   19,906.81x = 27,470.81 × 10,954.31
4. Step 4: Simplify right side
   19,906.81x = 300,923,658.72
5. Step 5: Solve for x
   x = 300,923,658.72/19,906.81
6. Step 6: Final answer
   x = 15,116.62