Finding the Fourth Proportional to 82,759.38, 124,139.34 and 20,429.88

Step by Step Solution

1. Step 1: Write the proportion equation
   82,759.38 : 124,139.34 = 20,429.88 : x
2. Step 2: Convert to fraction form
   82,759.38/124,139.34 = 20,429.88/x
3. Step 3: Cross multiply
   82,759.38x = 124,139.34 × 20,429.88
4. Step 4: Simplify right side
   82,759.38x = 2,536,151,819.48
5. Step 5: Solve for x
   x = 2,536,151,819.48/82,759.38
6. Step 6: Final answer
   x = 30,644.89