Finding the Third Proportional to 9,137.25 and 18,992.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,137.25 : 18,992.72 = 18,992.72 : x
2. Step 2: Convert to fraction form
   9,137.25/18,992.72 = 18,992.72/x
3. Step 3: Cross multiply
   9,137.25x = 18,992.72 × 18,992.72
4. Step 4: Simplify right side
   9,137.25x = 360,723,365.52
5. Step 5: Solve for x
   x = 360,723,365.52/9,137.25
6. Step 6: Final answer
   x = 39,478.33