Finding the Fourth Proportional to 82,568.28, 123,854.76 and 20,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   82,568.28 : 123,854.76 = 20,238.72 : x
2. Step 2: Convert to fraction form
   82,568.28/123,854.76 = 20,238.72/x
3. Step 3: Cross multiply
   82,568.28x = 123,854.76 × 20,238.72
4. Step 4: Simplify right side
   82,568.28x = 2,506,661,808.31
5. Step 5: Solve for x
   x = 2,506,661,808.31/82,568.28
6. Step 6: Final answer
   x = 30,358.65