Finding the Third Proportional to 10,413.56 and 21,520.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,413.56 : 21,520.69 = 21,520.69 : x
2. Step 2: Convert to fraction form
   10,413.56/21,520.69 = 21,520.69/x
3. Step 3: Cross multiply
   10,413.56x = 21,520.69 × 21,520.69
4. Step 4: Simplify right side
   10,413.56x = 463,139,990.47
5. Step 5: Solve for x
   x = 463,139,990.47/10,413.56
6. Step 6: Final answer
   x = 44,474.69