Finding the Fourth Proportional to 82,608.16, 123,912.42 and 20,278.84

Step by Step Solution

1. Step 1: Write the proportion equation
   82,608.16 : 123,912.42 = 20,278.84 : x
2. Step 2: Convert to fraction form
   82,608.16/123,912.42 = 20,278.84/x
3. Step 3: Cross multiply
   82,608.16x = 123,912.42 × 20,278.84
4. Step 4: Simplify right side
   82,608.16x = 2,512,800,139.19
5. Step 5: Solve for x
   x = 2,512,800,139.19/82,608.16
6. Step 6: Final answer
   x = 30,418.30