Finding the Third Proportional to 13,398 and 20,446.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,398 : 20,446.50 = 20,446.50 : x
2. Step 2: Convert to fraction form
   13,398/20,446.50 = 20,446.50/x
3. Step 3: Cross multiply
   13,398x = 20,446.50 × 20,446.50
4. Step 4: Simplify right side
   13,398x = 418,059,362.25
5. Step 5: Solve for x
   x = 418,059,362.25/13,398
6. Step 6: Final answer
   x = 31,203.12