Finding the Third Proportional to 12,139.50 and 19,302

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139.50 : 19,302 = 19,302 : x
2. Step 2: Convert to fraction form
   12,139.50/19,302 = 19,302/x
3. Step 3: Cross multiply
   12,139.50x = 19,302 × 19,302
4. Step 4: Simplify right side
   12,139.50x = 372,567,204
5. Step 5: Solve for x
   x = 372,567,204/12,139.50
6. Step 6: Final answer
   x = 30,690.49