Finding the Fourth Proportional to 42,269.50, 63,413.97 and 12,687.89

Step by Step Solution

1. Step 1: Write the proportion equation
   42,269.50 : 63,413.97 = 12,687.89 : x
2. Step 2: Convert to fraction form
   42,269.50/63,413.97 = 12,687.89/x
3. Step 3: Cross multiply
   42,269.50x = 63,413.97 × 12,687.89
4. Step 4: Simplify right side
   42,269.50x = 804,589,412.38
5. Step 5: Solve for x
   x = 804,589,412.38/42,269.50
6. Step 6: Final answer
   x = 19,034.75