Finding the Fourth Proportional to 12,719.80, 17,553.78 and 7,413.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,719.80 : 17,553.78 = 7,413.76 : x
2. Step 2: Convert to fraction form
   12,719.80/17,553.78 = 7,413.76/x
3. Step 3: Cross multiply
   12,719.80x = 17,553.78 × 7,413.76
4. Step 4: Simplify right side
   12,719.80x = 130,139,512.01
5. Step 5: Solve for x
   x = 130,139,512.01/12,719.80
6. Step 6: Final answer
   x = 10,231.25