Finding the Third Proportional to 72,945 and 109,489.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,945 : 109,489.50 = 109,489.50 : x
2. Step 2: Convert to fraction form
   72,945/109,489.50 = 109,489.50/x
3. Step 3: Cross multiply
   72,945x = 109,489.50 × 109,489.50
4. Step 4: Simplify right side
   72,945x = 11,987,950,610.25
5. Step 5: Solve for x
   x = 11,987,950,610.25/72,945
6. Step 6: Final answer
   x = 164,342.32