Finding the Third Proportional to 67,072 and 90,766.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,072 : 90,766.50 = 90,766.50 : x
2. Step 2: Convert to fraction form
   67,072/90,766.50 = 90,766.50/x
3. Step 3: Cross multiply
   67,072x = 90,766.50 × 90,766.50
4. Step 4: Simplify right side
   67,072x = 8,238,557,522.25
5. Step 5: Solve for x
   x = 8,238,557,522.25/67,072
6. Step 6: Final answer
   x = 122,831.55