Finding the Third Proportional to 51,890 and 80,499

Step by Step Solution

1. Step 1: Write the proportion equation
   51,890 : 80,499 = 80,499 : x
2. Step 2: Convert to fraction form
   51,890/80,499 = 80,499/x
3. Step 3: Cross multiply
   51,890x = 80,499 × 80,499
4. Step 4: Simplify right side
   51,890x = 6,480,089,001
5. Step 5: Solve for x
   x = 6,480,089,001/51,890
6. Step 6: Final answer
   x = 124,881.27