Finding the Fourth Proportional to 79,128.28, 109,198.37 and 48,912.82

Step by Step Solution

1. Step 1: Write the proportion equation
   79,128.28 : 109,198.37 = 48,912.82 : x
2. Step 2: Convert to fraction form
   79,128.28/109,198.37 = 48,912.82/x
3. Step 3: Cross multiply
   79,128.28x = 109,198.37 × 48,912.82
4. Step 4: Simplify right side
   79,128.28x = 5,341,200,065.39
5. Step 5: Solve for x
   x = 5,341,200,065.39/79,128.28
6. Step 6: Final answer
   x = 67,500.52