Finding the Third Proportional to 50,789 and 78,951

Step by Step Solution

1. Step 1: Write the proportion equation
   50,789 : 78,951 = 78,951 : x
2. Step 2: Convert to fraction form
   50,789/78,951 = 78,951/x
3. Step 3: Cross multiply
   50,789x = 78,951 × 78,951
4. Step 4: Simplify right side
   50,789x = 6,233,260,401
5. Step 5: Solve for x
   x = 6,233,260,401/50,789
6. Step 6: Final answer
   x = 122,728.55