Finding the Fourth Proportional to 20,757, 31,128.78 and 5,966.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,757 : 31,128.78 = 5,966.82 : x
2. Step 2: Convert to fraction form
   20,757/31,128.78 = 5,966.82/x
3. Step 3: Cross multiply
   20,757x = 31,128.78 × 5,966.82
4. Step 4: Simplify right side
   20,757x = 185,739,827.08
5. Step 5: Solve for x
   x = 185,739,827.08/20,757
6. Step 6: Final answer
   x = 8,948.30