Finding the Fourth Proportional to 20,716.43, 31,074.96 and 5,134.07

Step by Step Solution

1. Step 1: Write the proportion equation
   20,716.43 : 31,074.96 = 5,134.07 : x
2. Step 2: Convert to fraction form
   20,716.43/31,074.96 = 5,134.07/x
3. Step 3: Cross multiply
   20,716.43x = 31,074.96 × 5,134.07
4. Step 4: Simplify right side
   20,716.43x = 159,541,019.89
5. Step 5: Solve for x
   x = 159,541,019.89/20,716.43
6. Step 6: Final answer
   x = 7,701.18