Finding the Third Proportional to 20,112.38 and 30,129.56

Step by Step Solution

1. Step 1: Write the proportion equation
   20,112.38 : 30,129.56 = 30,129.56 : x
2. Step 2: Convert to fraction form
   20,112.38/30,129.56 = 30,129.56/x
3. Step 3: Cross multiply
   20,112.38x = 30,129.56 × 30,129.56
4. Step 4: Simplify right side
   20,112.38x = 907,790,536.44
5. Step 5: Solve for x
   x = 907,790,536.44/20,112.38
6. Step 6: Final answer
   x = 45,135.92