Finding the Third Proportional to 9,878 and 10,958

Step by Step Solution

1. Step 1: Write the proportion equation
   9,878 : 10,958 = 10,958 : x
2. Step 2: Convert to fraction form
   9,878/10,958 = 10,958/x
3. Step 3: Cross multiply
   9,878x = 10,958 × 10,958
4. Step 4: Simplify right side
   9,878x = 120,077,764
5. Step 5: Solve for x
   x = 120,077,764/9,878
6. Step 6: Final answer
   x = 12,156.08