Finding the Third Proportional to 72,309 and 108,079.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,309 : 108,079.50 = 108,079.50 : x
2. Step 2: Convert to fraction form
   72,309/108,079.50 = 108,079.50/x
3. Step 3: Cross multiply
   72,309x = 108,079.50 × 108,079.50
4. Step 4: Simplify right side
   72,309x = 11,681,178,320.25
5. Step 5: Solve for x
   x = 11,681,178,320.25/72,309
6. Step 6: Final answer
   x = 161,545.29