Finding the Fourth Proportional to 20,744.69, 31,117.13 and 5,162.31

Step by Step Solution

1. Step 1: Write the proportion equation
   20,744.69 : 31,117.13 = 5,162.31 : x
2. Step 2: Convert to fraction form
   20,744.69/31,117.13 = 5,162.31/x
3. Step 3: Cross multiply
   20,744.69x = 31,117.13 × 5,162.31
4. Step 4: Simplify right side
   20,744.69x = 160,636,245.56
5. Step 5: Solve for x
   x = 160,636,245.56/20,744.69
6. Step 6: Final answer
   x = 7,743.49