Finding the Fourth Proportional to 82,867.72, 124,302.84 and 20,538.28

Step by Step Solution

1. Step 1: Write the proportion equation
   82,867.72 : 124,302.84 = 20,538.28 : x
2. Step 2: Convert to fraction form
   82,867.72/124,302.84 = 20,538.28/x
3. Step 3: Cross multiply
   82,867.72x = 124,302.84 × 20,538.28
4. Step 4: Simplify right side
   82,867.72x = 2,552,966,532.72
5. Step 5: Solve for x
   x = 2,552,966,532.72/82,867.72
6. Step 6: Final answer
   x = 30,807.73