Finding the Fourth Proportional to 82,957.89, 124,437.32 and 20,628.39

Step by Step Solution

1. Step 1: Write the proportion equation
   82,957.89 : 124,437.32 = 20,628.39 : x
2. Step 2: Convert to fraction form
   82,957.89/124,437.32 = 20,628.39/x
3. Step 3: Cross multiply
   82,957.89x = 124,437.32 × 20,628.39
4. Step 4: Simplify right side
   82,957.89x = 2,566,940,996.90
5. Step 5: Solve for x
   x = 2,566,940,996.90/82,957.89
6. Step 6: Final answer
   x = 30,942.70