Finding the Third Proportional to 80,503 and 105,890

Step by Step Solution

1. Step 1: Write the proportion equation
   80,503 : 105,890 = 105,890 : x
2. Step 2: Convert to fraction form
   80,503/105,890 = 105,890/x
3. Step 3: Cross multiply
   80,503x = 105,890 × 105,890
4. Step 4: Simplify right side
   80,503x = 11,212,692,100
5. Step 5: Solve for x
   x = 11,212,692,100/80,503
6. Step 6: Final answer
   x = 139,282.91