Finding the Fourth Proportional to 82,868.19, 124,302.21 and 20,538.69

Step by Step Solution

1. Step 1: Write the proportion equation
   82,868.19 : 124,302.21 = 20,538.69 : x
2. Step 2: Convert to fraction form
   82,868.19/124,302.21 = 20,538.69/x
3. Step 3: Cross multiply
   82,868.19x = 124,302.21 × 20,538.69
4. Step 4: Simplify right side
   82,868.19x = 2,553,004,557.50
5. Step 5: Solve for x
   x = 2,553,004,557.50/82,868.19
6. Step 6: Final answer
   x = 30,808.02