Finding the Third Proportional to 12,691.50 and 18,669.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,691.50 : 18,669.38 = 18,669.38 : x
2. Step 2: Convert to fraction form
   12,691.50/18,669.38 = 18,669.38/x
3. Step 3: Cross multiply
   12,691.50x = 18,669.38 × 18,669.38
4. Step 4: Simplify right side
   12,691.50x = 348,545,562.89
5. Step 5: Solve for x
   x = 348,545,562.89/12,691.50
6. Step 6: Final answer
   x = 27,462.91