Finding the Third Proportional to 50,878 and 79,131

Step by Step Solution

1. Step 1: Write the proportion equation
   50,878 : 79,131 = 79,131 : x
2. Step 2: Convert to fraction form
   50,878/79,131 = 79,131/x
3. Step 3: Cross multiply
   50,878x = 79,131 × 79,131
4. Step 4: Simplify right side
   50,878x = 6,261,715,161
5. Step 5: Solve for x
   x = 6,261,715,161/50,878
6. Step 6: Final answer
   x = 123,073.14