Finding the Fourth Proportional to 13,839.96, 20,763.18 and 5,079

Step by Step Solution

1. Step 1: Write the proportion equation
   13,839.96 : 20,763.18 = 5,079 : x
2. Step 2: Convert to fraction form
   13,839.96/20,763.18 = 5,079/x
3. Step 3: Cross multiply
   13,839.96x = 20,763.18 × 5,079
4. Step 4: Simplify right side
   13,839.96x = 105,456,191.22
5. Step 5: Solve for x
   x = 105,456,191.22/13,839.96
6. Step 6: Final answer
   x = 7,619.69