Finding the Third Proportional to 73,129.50 and 109,215.38

Step by Step Solution

1. Step 1: Write the proportion equation
   73,129.50 : 109,215.38 = 109,215.38 : x
2. Step 2: Convert to fraction form
   73,129.50/109,215.38 = 109,215.38/x
3. Step 3: Cross multiply
   73,129.50x = 109,215.38 × 109,215.38
4. Step 4: Simplify right side
   73,129.50x = 11,927,998,136.39
5. Step 5: Solve for x
   x = 11,927,998,136.39/73,129.50
6. Step 6: Final answer
   x = 163,107.89