Finding the Fourth Proportional to 20,741.69, 31,112.38 and 5,159.32

Step by Step Solution

1. Step 1: Write the proportion equation
   20,741.69 : 31,112.38 = 5,159.32 : x
2. Step 2: Convert to fraction form
   20,741.69/31,112.38 = 5,159.32/x
3. Step 3: Cross multiply
   20,741.69x = 31,112.38 × 5,159.32
4. Step 4: Simplify right side
   20,741.69x = 160,518,724.38
5. Step 5: Solve for x
   x = 160,518,724.38/20,741.69
6. Step 6: Final answer
   x = 7,738.94