Finding the Third Proportional to 12,658 and 20,158

Step by Step Solution

1. Step 1: Write the proportion equation
   12,658 : 20,158 = 20,158 : x
2. Step 2: Convert to fraction form
   12,658/20,158 = 20,158/x
3. Step 3: Cross multiply
   12,658x = 20,158 × 20,158
4. Step 4: Simplify right side
   12,658x = 406,344,964
5. Step 5: Solve for x
   x = 406,344,964/12,658
6. Step 6: Final answer
   x = 32,101.83