Finding the Third Proportional to 7,906 and 12,938

Step by Step Solution

1. Step 1: Write the proportion equation
   7,906 : 12,938 = 12,938 : x
2. Step 2: Convert to fraction form
   7,906/12,938 = 12,938/x
3. Step 3: Cross multiply
   7,906x = 12,938 × 12,938
4. Step 4: Simplify right side
   7,906x = 167,391,844
5. Step 5: Solve for x
   x = 167,391,844/7,906
6. Step 6: Final answer
   x = 21,172.76