Finding the Third Proportional to 12,216.38 and 19,359

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216.38 : 19,359 = 19,359 : x
2. Step 2: Convert to fraction form
   12,216.38/19,359 = 19,359/x
3. Step 3: Cross multiply
   12,216.38x = 19,359 × 19,359
4. Step 4: Simplify right side
   12,216.38x = 374,770,881
5. Step 5: Solve for x
   x = 374,770,881/12,216.38
6. Step 6: Final answer
   x = 30,677.75