Finding the Third Proportional to 51,666 and 78,981

Step by Step Solution

1. Step 1: Write the proportion equation
   51,666 : 78,981 = 78,981 : x
2. Step 2: Convert to fraction form
   51,666/78,981 = 78,981/x
3. Step 3: Cross multiply
   51,666x = 78,981 × 78,981
4. Step 4: Simplify right side
   51,666x = 6,237,998,361
5. Step 5: Solve for x
   x = 6,237,998,361/51,666
6. Step 6: Final answer
   x = 120,737.01