Finding the Third Proportional to 51,870 and 80,108

Step by Step Solution

1. Step 1: Write the proportion equation
   51,870 : 80,108 = 80,108 : x
2. Step 2: Convert to fraction form
   51,870/80,108 = 80,108/x
3. Step 3: Cross multiply
   51,870x = 80,108 × 80,108
4. Step 4: Simplify right side
   51,870x = 6,417,291,664
5. Step 5: Solve for x
   x = 6,417,291,664/51,870
6. Step 6: Final answer
   x = 123,718.75