Finding the Third Proportional to 40,474.69 and 64,660.78

Step by Step Solution

1. Step 1: Write the proportion equation
   40,474.69 : 64,660.78 = 64,660.78 : x
2. Step 2: Convert to fraction form
   40,474.69/64,660.78 = 64,660.78/x
3. Step 3: Cross multiply
   40,474.69x = 64,660.78 × 64,660.78
4. Step 4: Simplify right side
   40,474.69x = 4,181,016,631.86
5. Step 5: Solve for x
   x = 4,181,016,631.86/40,474.69
6. Step 6: Final answer
   x = 103,299.54