Finding the Third Proportional to 10,212 and 12,588

Step by Step Solution

1. Step 1: Write the proportion equation
   10,212 : 12,588 = 12,588 : x
2. Step 2: Convert to fraction form
   10,212/12,588 = 12,588/x
3. Step 3: Cross multiply
   10,212x = 12,588 × 12,588
4. Step 4: Simplify right side
   10,212x = 158,457,744
5. Step 5: Solve for x
   x = 158,457,744/10,212
6. Step 6: Final answer
   x = 15,516.82