Finding the Third Proportional to 9,138.94 and 19,929.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,138.94 : 19,929.38 = 19,929.38 : x
2. Step 2: Convert to fraction form
   9,138.94/19,929.38 = 19,929.38/x
3. Step 3: Cross multiply
   9,138.94x = 19,929.38 × 19,929.38
4. Step 4: Simplify right side
   9,138.94x = 397,179,987.89
5. Step 5: Solve for x
   x = 397,179,987.89/9,138.94
6. Step 6: Final answer
   x = 43,460.19