Finding the Fourth Proportional to 20,588.69, 28,413.79 and 12,525.47

Step by Step Solution

1. Step 1: Write the proportion equation
   20,588.69 : 28,413.79 = 12,525.47 : x
2. Step 2: Convert to fraction form
   20,588.69/28,413.79 = 12,525.47/x
3. Step 3: Cross multiply
   20,588.69x = 28,413.79 × 12,525.47
4. Step 4: Simplify right side
   20,588.69x = 355,895,900.85
5. Step 5: Solve for x
   x = 355,895,900.85/20,588.69
6. Step 6: Final answer
   x = 17,285.99