Finding the Third Proportional to 9,909 and 13,908

Step by Step Solution

1. Step 1: Write the proportion equation
   9,909 : 13,908 = 13,908 : x
2. Step 2: Convert to fraction form
   9,909/13,908 = 13,908/x
3. Step 3: Cross multiply
   9,909x = 13,908 × 13,908
4. Step 4: Simplify right side
   9,909x = 193,432,464
5. Step 5: Solve for x
   x = 193,432,464/9,909
6. Step 6: Final answer
   x = 19,520.89