Finding the Fourth Proportional to 82,928, 124,391.64 and 20,598.56

Step by Step Solution

1. Step 1: Write the proportion equation
   82,928 : 124,391.64 = 20,598.56 : x
2. Step 2: Convert to fraction form
   82,928/124,391.64 = 20,598.56/x
3. Step 3: Cross multiply
   82,928x = 124,391.64 × 20,598.56
4. Step 4: Simplify right side
   82,928x = 2,562,288,660.04
5. Step 5: Solve for x
   x = 2,562,288,660.04/82,928
6. Step 6: Final answer
   x = 30,897.75