Finding the Fourth Proportional to 20,914.72, 31,371.89 and 5,119.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,914.72 : 31,371.89 = 5,119.82 : x
2. Step 2: Convert to fraction form
   20,914.72/31,371.89 = 5,119.82/x
3. Step 3: Cross multiply
   20,914.72x = 31,371.89 × 5,119.82
4. Step 4: Simplify right side
   20,914.72x = 160,618,570.31
5. Step 5: Solve for x
   x = 160,618,570.31/20,914.72
6. Step 6: Final answer
   x = 7,679.69