Finding the Third Proportional to 2,158 and 2,158

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158 : 2,158 = 2,158 : x
2. Step 2: Convert to fraction form
   2,158/2,158 = 2,158/x
3. Step 3: Cross multiply
   2,158x = 2,158 × 2,158
4. Step 4: Simplify right side
   2,158x = 4,656,964
5. Step 5: Solve for x
   x = 4,656,964/2,158
6. Step 6: Final answer
   x = 2,158