Finding the Fourth Proportional to 20,727.07, 31,090.60 and 5,144.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,727.07 : 31,090.60 = 5,144.69 : x
2. Step 2: Convert to fraction form
   20,727.07/31,090.60 = 5,144.69/x
3. Step 3: Cross multiply
   20,727.07x = 31,090.60 × 5,144.69
4. Step 4: Simplify right side
   20,727.07x = 159,951,498.91
5. Step 5: Solve for x
   x = 159,951,498.91/20,727.07
6. Step 6: Final answer
   x = 7,717.03