Finding the Fourth Proportional to 20,751.42, 31,127.25 and 5,169.06

Step by Step Solution

1. Step 1: Write the proportion equation
   20,751.42 : 31,127.25 = 5,169.06 : x
2. Step 2: Convert to fraction form
   20,751.42/31,127.25 = 5,169.06/x
3. Step 3: Cross multiply
   20,751.42x = 31,127.25 × 5,169.06
4. Step 4: Simplify right side
   20,751.42x = 160,898,622.89
5. Step 5: Solve for x
   x = 160,898,622.89/20,751.42
6. Step 6: Final answer
   x = 7,753.62