Finding the Third Proportional to 9,129 and 13,191

Step by Step Solution

1. Step 1: Write the proportion equation
   9,129 : 13,191 = 13,191 : x
2. Step 2: Convert to fraction form
   9,129/13,191 = 13,191/x
3. Step 3: Cross multiply
   9,129x = 13,191 × 13,191
4. Step 4: Simplify right side
   9,129x = 174,002,481
5. Step 5: Solve for x
   x = 174,002,481/9,129
6. Step 6: Final answer
   x = 19,060.41