Finding the Third Proportional to 13,138 and 20,118

Step by Step Solution

1. Step 1: Write the proportion equation
   13,138 : 20,118 = 20,118 : x
2. Step 2: Convert to fraction form
   13,138/20,118 = 20,118/x
3. Step 3: Cross multiply
   13,138x = 20,118 × 20,118
4. Step 4: Simplify right side
   13,138x = 404,733,924
5. Step 5: Solve for x
   x = 404,733,924/13,138
6. Step 6: Final answer
   x = 30,806.36