Finding the Third Proportional to 20,936.81 and 31,451.63

Step by Step Solution

1. Step 1: Write the proportion equation
   20,936.81 : 31,451.63 = 31,451.63 : x
2. Step 2: Convert to fraction form
   20,936.81/31,451.63 = 31,451.63/x
3. Step 3: Cross multiply
   20,936.81x = 31,451.63 × 31,451.63
4. Step 4: Simplify right side
   20,936.81x = 989,204,715.14
5. Step 5: Solve for x
   x = 989,204,715.14/20,936.81
6. Step 6: Final answer
   x = 47,247.15