Finding the Third Proportional to 20,257.31 and 30,665.81

Step by Step Solution

1. Step 1: Write the proportion equation
   20,257.31 : 30,665.81 = 30,665.81 : x
2. Step 2: Convert to fraction form
   20,257.31/30,665.81 = 30,665.81/x
3. Step 3: Cross multiply
   20,257.31x = 30,665.81 × 30,665.81
4. Step 4: Simplify right side
   20,257.31x = 940,392,056.29
5. Step 5: Solve for x
   x = 940,392,056.29/20,257.31
6. Step 6: Final answer
   x = 46,422.35