Finding the Third Proportional to 60,876 and 86,878

Step by Step Solution

1. Step 1: Write the proportion equation
   60,876 : 86,878 = 86,878 : x
2. Step 2: Convert to fraction form
   60,876/86,878 = 86,878/x
3. Step 3: Cross multiply
   60,876x = 86,878 × 86,878
4. Step 4: Simplify right side
   60,876x = 7,547,786,884
5. Step 5: Solve for x
   x = 7,547,786,884/60,876
6. Step 6: Final answer
   x = 123,986.25