Finding the Fourth Proportional to 20,582.82, 28,404.84 and 12,629.46

Step by Step Solution

1. Step 1: Write the proportion equation
   20,582.82 : 28,404.84 = 12,629.46 : x
2. Step 2: Convert to fraction form
   20,582.82/28,404.84 = 12,629.46/x
3. Step 3: Cross multiply
   20,582.82x = 28,404.84 × 12,629.46
4. Step 4: Simplify right side
   20,582.82x = 358,737,790.59
5. Step 5: Solve for x
   x = 358,737,790.59/20,582.82
6. Step 6: Final answer
   x = 17,428.99