Finding the Third Proportional to 50,644 and 78,621

Step by Step Solution

1. Step 1: Write the proportion equation
   50,644 : 78,621 = 78,621 : x
2. Step 2: Convert to fraction form
   50,644/78,621 = 78,621/x
3. Step 3: Cross multiply
   50,644x = 78,621 × 78,621
4. Step 4: Simplify right side
   50,644x = 6,181,261,641
5. Step 5: Solve for x
   x = 6,181,261,641/50,644
6. Step 6: Final answer
   x = 122,053.19