Finding the Third Proportional to 50,777 and 78,940

Step by Step Solution

1. Step 1: Write the proportion equation
   50,777 : 78,940 = 78,940 : x
2. Step 2: Convert to fraction form
   50,777/78,940 = 78,940/x
3. Step 3: Cross multiply
   50,777x = 78,940 × 78,940
4. Step 4: Simplify right side
   50,777x = 6,231,523,600
5. Step 5: Solve for x
   x = 6,231,523,600/50,777
6. Step 6: Final answer
   x = 122,723.35