Finding the Third Proportional to 12,851 and 19,191

Step by Step Solution

1. Step 1: Write the proportion equation
   12,851 : 19,191 = 19,191 : x
2. Step 2: Convert to fraction form
   12,851/19,191 = 19,191/x
3. Step 3: Cross multiply
   12,851x = 19,191 × 19,191
4. Step 4: Simplify right side
   12,851x = 368,294,481
5. Step 5: Solve for x
   x = 368,294,481/12,851
6. Step 6: Final answer
   x = 28,658.82