Finding the Third Proportional to 2,996.50 and 6,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,996.50 : 6,139.50 = 6,139.50 : x
2. Step 2: Convert to fraction form
   2,996.50/6,139.50 = 6,139.50/x
3. Step 3: Cross multiply
   2,996.50x = 6,139.50 × 6,139.50
4. Step 4: Simplify right side
   2,996.50x = 37,693,460.25
5. Step 5: Solve for x
   x = 37,693,460.25/2,996.50
6. Step 6: Final answer
   x = 12,579.16