Finding the Third Proportional to 12,939 and 19,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,939 : 19,510.50 = 19,510.50 : x
2. Step 2: Convert to fraction form
   12,939/19,510.50 = 19,510.50/x
3. Step 3: Cross multiply
   12,939x = 19,510.50 × 19,510.50
4. Step 4: Simplify right side
   12,939x = 380,659,610.25
5. Step 5: Solve for x
   x = 380,659,610.25/12,939
6. Step 6: Final answer
   x = 29,419.55