Finding the Fourth Proportional to 79,540.78, 119,308.41 and 20,377.03

Step by Step Solution

1. Step 1: Write the proportion equation
   79,540.78 : 119,308.41 = 20,377.03 : x
2. Step 2: Convert to fraction form
   79,540.78/119,308.41 = 20,377.03/x
3. Step 3: Cross multiply
   79,540.78x = 119,308.41 × 20,377.03
4. Step 4: Simplify right side
   79,540.78x = 2,431,151,049.82
5. Step 5: Solve for x
   x = 2,431,151,049.82/79,540.78
6. Step 6: Final answer
   x = 30,564.84