Finding the Fourth Proportional to 13,820.27, 20,726.73 and 3,959.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,820.27 : 20,726.73 = 3,959.96 : x
2. Step 2: Convert to fraction form
   13,820.27/20,726.73 = 3,959.96/x
3. Step 3: Cross multiply
   13,820.27x = 20,726.73 × 3,959.96
4. Step 4: Simplify right side
   13,820.27x = 82,076,918.10
5. Step 5: Solve for x
   x = 82,076,918.10/13,820.27
6. Step 6: Final answer
   x = 5,938.88