Finding the Third Proportional to 20,415.38 and 31,215.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,415.38 : 31,215.38 = 31,215.38 : x
2. Step 2: Convert to fraction form
   20,415.38/31,215.38 = 31,215.38/x
3. Step 3: Cross multiply
   20,415.38x = 31,215.38 × 31,215.38
4. Step 4: Simplify right side
   20,415.38x = 974,399,636.39
5. Step 5: Solve for x
   x = 974,399,636.39/20,415.38
6. Step 6: Final answer
   x = 47,728.72