Finding the Third Proportional to 9,158 and 13,913

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158 : 13,913 = 13,913 : x
2. Step 2: Convert to fraction form
   9,158/13,913 = 13,913/x
3. Step 3: Cross multiply
   9,158x = 13,913 × 13,913
4. Step 4: Simplify right side
   9,158x = 193,571,569
5. Step 5: Solve for x
   x = 193,571,569/9,158
6. Step 6: Final answer
   x = 21,136.88