Finding the Third Proportional to 39,413.44 and 56,659.78

Step by Step Solution

1. Step 1: Write the proportion equation
   39,413.44 : 56,659.78 = 56,659.78 : x
2. Step 2: Convert to fraction form
   39,413.44/56,659.78 = 56,659.78/x
3. Step 3: Cross multiply
   39,413.44x = 56,659.78 × 56,659.78
4. Step 4: Simplify right side
   39,413.44x = 3,210,330,811.30
5. Step 5: Solve for x
   x = 3,210,330,811.30/39,413.44
6. Step 6: Final answer
   x = 81,452.70